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A Look at Rocks and Minerals

Rocks and minerals are all around us. They compose the very foundation of the earth, and they can be found in every type of landscape.

Rocks and minerals are all around us. They compose the very foundation of the earth, and they can be found in every type of landscape.

Rocks are classified according to their mineral content, and they can be either igneous, sedimentary or metamorphic. Igneous rocks are formed from cooled lava or magma, and they include granite and basalt. Sedimentary rocks are created when smaller rocks are combined together by pressure and heat, and they include sandstone and shale. Metamorphic rocks are rocks that have been changed by heat or pressure, including slate and marble. Each type of rock has a unique appearance and composition, and rocks can be used for a variety of purposes. For example, granite is often used in construction because it is strong and durable, while slate is popular for roofing because it is weather resistant.

The rocks on the earth’s surface are constantly changing, through a process of weathering and erosion. Over time, rocks can be broken down into smaller and smaller pieces, eventually becoming sand or dust.

Minerals, on the other hand, are naturally occurring substances that have a definite chemical composition. There are over 4,000 different types of minerals on Earth, each with their own distinct properties. Many rocks and minerals are used in everyday life — from the iron in our blood to the salt we add to our food. Others have more unusual applications: did you know that diamonds are used in drill bits and gemstones are used in lasers? Rocks and minerals are an essential part of our world, and there is still much to learn about them.

We’ll take a look at rocks and minerals featured in past Nest Egg Auctions, such as precious metals, gems and fossils, as well as more rare finds. If you have a collection of rocks or minerals, we’d like to hear from you. Nest Egg Auctions is capable of appraising and selling on consignment at auction, as well outright purchasing collections from sellers of rocks and minerals.

Contact Nest Egg Auctions today at 203-630-1400 or by sending us a message.



Gold is a precious metal that’s been prized by humans for thousands of years. Its distinct properties — including its high luster, malleability and resistance to corrosion — have made it an essential ingredient in jewelry, coins and other objects of art and value. Its value is derived from its rarity, physical properties and cultural significance.

Gold is rare enough that it can only be found in certain parts of the world, and it is difficult to extract from the ground. Because it’s so rare, gold is also one of the most valuable commodities on the market. The price of gold fluctuates depending on a number of factors, including economic conditions and geopolitical tensions.

Gold remains an important part of the global economy, with central banks and private investors holding large reserves of the metal. Gold is also used in a variety of industrial applications, as well as computer chips and other electronic devices, due to its excellent electrical conductivity and resistance to tarnish. Whether as a store of wealth or as a raw material for industry, gold plays a vital role in the 21st century.

Gold Specimen


Platinum is a precious metal that is often used in jewelry, decorative items and other high-end products. It is prized for its rarity, beauty, and durability. It’s also used in industry for its properties of corrosion resistance and electrical conductivity.

Although it is found naturally in some parts of the world, most platinum is mined in South Africa and Russia. The metal is often used as a catalyst in chemical reactions and it is also being researched for possible medical applications.

Platinum Specimen

The metal is very rare, and it is estimated there are only about 20 tons of platinum in existence. Because of its rarity, platinum is one of the most valuable metals in the world, costing more than gold and silver and often used as a store of value or investment. Platinum is also found in catalytic converters, which help to reduce air pollution. Although platinum is expensive, its unique properties make it an essential material in many industries. In the near future, platinum may become even more valuable as demand for the metal increases.


Silver is one of the few elements found in its purest form in nature and has a long history of being used in jewelry, coins and other decorative objects. In recent years, silver has become increasingly popular as an investment commodity due to its relatively low cost and high value. While the price of silver can fluctuate significantly, it remains a precious metal that’s sure to retain its value for years to come.

Silver is also used in industry and technology. It’s a highly conductive metal, which makes it ideal for use in electrical applications, such as electronic components and photography. Silver is also antimicrobial, capable of killing bacteria, fungi and certain viruses, and has been applied in medical scenarios for centuries.

Silver is abundant in the Earth’s crust and is mined in many countries around the world. The metal is extracted from ore using a variety of methods, including open-pit mining and underground mining. Once silver has been extracted from the ore, it’s purified using a process called smelting. Silver has a bright white color and is very reflective, making it perfect for mirrors and other optical devices. It’s also quite malleable, meaning it can be easily reshaped into different forms. These versatile properties allow silver to be used for a wide range of purposes.

Silver Specimen



Found in several countries around the world, fluorite is a mineral that forms in a wide range of colors, including purple, blue, green, yellow and pink. Fluorite is sometimes called “the most colorful mineral in the world” because of its wide range of hues.

It’s also the mineral with the widest range of colors that occur in a single crystal. The different colors of fluorite are caused by impurities in the mineral’s structure. For example, if fluorite contains small amounts of yttrium or ytterbium, it will have a yellow color. If it contains small amounts of calcium or lanthanum, it will be blue. Green fluorite occurs when small amounts of chromium or vanadium are present.

Fluorite is used in a variety of industries, including construction, glassmaking and steelmaking. It can be used as a gemstone as well. Also known as fluorspar, fluorite is typically found in deposits of igneous and metamorphic rocks. It is the main source of fluorine, which is used in a variety of applications including toothpaste, refrigerants and Teflon. When fluorite is exposed to ultraviolet light, it glows brightly. This property has made fluorite popular for use in scientific and industrial applications requiring high-intensity lighting.

New Hampshire Flourite Specimen

One of the most important uses for fluorite is in the production of hydrofluoric acid. Hydrofluoric acid is used in a number of industries, including glass manufacturing, metal refining and electronics production. Fluorite is also used as a flux in iron and steel production. In addition, fluorite can be used as a source of fluorine for chemicals and pharmaceuticals.

Fluorite is also used as a flux in iron and steel production, and it’s used to make optics and glassware. It typically forms in cubic or octahedral crystals, and it has a Mohs hardness of 4. Fluorite was first described in 1530 by Georgius Agricola, and its name comes from the Latin word for “flow.” The mineral can be found in many parts of the world, including Brazil, China, England, France, Germany, Mexico, Morocco, Russia, Spain and the United States.


Rough Gems

Rough gems are uncut and unpolished gemstones. Typically found in streambeds, alluvial deposits or mines, they are still in their natural state, with a rough, uneven surface. Rough gems come in a variety of shapes and sizes, and each type of gemstone has its own unique properties. Rough gems are usually less expensive than finished gems.

Some rough gems are more valuable than others, depending on their rarity and the quality of the stone. The most popular rough gems include diamonds, emeralds, sapphires and rubies. These stones are often used in jewelry and other decorative items. Rough gems can also be cut and polished to create beautiful gemstones. The process of cutting and polishing rough gems is an art form in itself, and it takes a skilled craftsman to create a masterpiece.

Rough Morganite Specimen

The first step in creating a rough gem is to assess its potential. This involves taking into account the size, color, clarity and flaws of the stone. Once a rough gem has been graded, it can be cut and polished into a finished product.

There are four different types of rough gems: brilliants, step cuts, cabochons and rose cuts. Brilliants are the most popular type of rough gem and are cut into round or oval shapes. Step cuts are rectangular or square-shaped rough gems that have large facets that run parallel to each other. Cabochons are rough gems that have been shaped into a dome-like form and typically have a polished surface. Rose cuts are rough gems that have been cut into a rounded shape with triangular facets on the top. Rough gems can be used to create a variety of finished products, from engagement rings to pendants to earrings.

Cut Gems

Cut gems are gems that have been cut and polished to enhance their shine and clarity. There are many different types of cut gems, including round cut gems, emerald cut gems and princess cut gems. Round cut gems are the most popular type of cut gem, with 58 facets and a classic, circular shape perfect for setting in jewelry. Emerald cut gems are characterized by their step cut facets, which create a distinct sparkle. Princess cut gems are a more modern option, with a square or rectangular shape that is a popular choice for those who desire something different. Other types of cuts include the oval and pear cuts.

The cut of a gemstone is critical for two reasons: brilliance and fire. Brilliant cut stones have more facets and produce more sparkle, while fire cut stones have fewer facets but emit more color. The most popular cut for diamonds is the round brilliant cut, which Maximillian III, Elector of Bavaria commissioned in 1675. Other popular diamond cuts include the marquise, pear, oval and heart.

For colored gemstones, the most popular cut is the brilliant cut, followed by the step cut, which has parallel rows of facets cut into the stone to create a stair-stepping effect. The emerald cut is another type of step cut that is often used for emeralds and other green stones. Cabochon cuts are smooth, domed cuts that do not have faceting and are best suited for opaque or semitransparent stones. Cut gems are graded on four criteria: proportion, symmetry, brightness and finish. The ideal proportions for a round brilliant cut diamond are 59% table (top), 13% girdle (middle), and 28% pavilion (bottom).

Cut Gemstone


Crystals are solid, mineral substances that have a regular, repeating internal structure. Crystals are usually formed by slow cooling of a melt or solution, by rapid cooling of a vapor or by slow precipitation from a supersaturated solution. There are numerous types of crystals, including quartz, diamonds, sapphires and rubies. Crystals can also be made of organic molecules, such as sugars and DNA, as well as inorganic molecules, such as salt and metals. Some crystals are composed of two or more different kinds of
atoms or molecules.

Calcite Pyrite Crytsal Matrix

In addition to their varied composition, crystals can also vary in shape and structure. For example, quartz crystals typically have a six-sided prism shape, while diamond crystals typically have an octahedral shape. Each type of crystal has its own unique properties, and crystals can be used for a variety of purposes, from jewelry to energy healing.

Although crystals are often thought of as being clear or translucent, they actually come in a wide range of colors, depending on the type of crystal and the impurities present in it.

New Age Crystals

New age crystals are stones that are believed to have metaphysical properties. They are often used in new age practices such as crystal therapy and energy healing, both forms of alternative medicine. There are several different types of new age crystals, each with its own distinct set of supposed benefits. For example, amethyst is said to be helpful for those who suffer from anxiety, stress or addiction. Rose quartz is believed to be a heart chakra stone of love and forgiveness, while citrine is said to boost creativity and motivation.

New age crystals can be worn as jewelry, carried in a pocket or placed around the home. Some people even choose to sleep with crystals under their pillows and meditate with crystals, holding them in their hands or placing them on their body.

Quartz Crystal



Amber is a fossilized resin that’s formed when tree sap becomes hardened and preserved over time. Containing items such as twigs, leaves or insects, the tree sap is typically amber-colored, but it can be found in a range of other colors, including white, red and green. Amber can also be translucent or opaque and is typically classified based on its color, transparency and the presence of inclusions.

Amber — derived from the Arabic anbar and the Persian ambar, both of which mean “ambergris” or “jewel” — is often used in jewelry and other decorative items, but it can also be used for scientific purposes. For example, amber can be used to create amber beads, which are used to measure the radioactivity of materials. Amber can also be used to create amber fossils, which are used to study the history of life on Earth.

Amber Specimen

There are two main types of amber: body amber and surface amber. Body amber is found inside the tree trunk, while surface amber is found on the tree’s bark. Body amber is typically older and more valuable than surface amber.

The most common amber is known as Baltic amber, which comes from the Baltic region of Europe. Baltic amber is estimated to be between 30 and 90 million years old. Other types of amber include Dominican amber, which is found in the Dominican Republic, and Mexican amber, which is found in Mexico.


Ammonites are a type of extinct cephalopod that lived during the Mesozoic era. They are closely related to modern-day squid, octopuses and cuttlefish. Ammonites generally had a coiled shell, and some species could grow to be very large. There are many different types of ammonites, including the spiral-shaped ammonites that are often found in fossilized form. The different types of ammonites can be distinguished by the shape of their shells. Some common ammonite shapes include spirals, Discosauriscus, spines and parentales.

Ammonites were predators that fed on smaller marine creatures. They had a hard shell that protected their soft body, and they propelled themselves by spewing water from their siphon. Ammonites went through a process of evolution and diversification, and they eventually went extinct during the Cretaceous-Paleogene mass extinction event. Despite their extinction, ammonites have left behind a rich fossil record that has provided scientists with valuable insights into the distant past. Ammonites are often used by scientists as index fossils, as they can help to date rocks from the Mesozoic era.

Ammonite Fossil


Ammolite is an opal-like gemstone composed of the fossilized shells of ammonites, ancient marine animals with a distinctive spiral shape. Ammonites lived during the Mesozoic Era, and their fossils can be found in many parts of the world.

Ammolite is prized for its iridescent colors, which can range from blue to green to red, caused by the mineral aragonite. The stone is relatively soft, so it is typically cut into cabochons or beads. Ammolite is sometimes used in jewelry, but it is more commonly used as a collector’s item. The stone is believed to have mystical properties, and it is thought to promote physical and spiritual healing as well as creativity and imagination.

Gem-grade ammolite is found in sedimentary rocks, and is mainly located in Lethbridge, Alberta, Canada. It has a lustrous appearance, and its colors can range from green to red to blue. The ammolite gemstone is used in jewelry, and is also used as a decorative element in other objects such as vases and clocks.

Dinosaur Fossils

A dinosaur fossil is the preserved remains or traces of a dinosaur that has been excavated from the ground. Dinosaur fossils can be found all over the world, and they come in a variety of forms.

There are two main types of dinosaur fossils: petrified and cast. Petrified fossils are created when dinosaur bones are buried in mud or sand and then exposed to minerals, which replace the bone cells with stone. This process can take millions of years to complete. Dinosaur bones are often found in sandstone or shale deposits, which provides the perfect environment for fossilization.

Cast fossils, on the other hand, occur when dinosaur bones decay and leave an empty space in the rock. This space is then filled in by minerals, creating a three-dimensional replica of the original bone.

Another type of dinosaur fossil is the footprint fossil, which is created when a dinosaur walks through soft mud or clay and leaves an imprint. Footprint fossils are often found in areas where dinosaurs once roamed, such as floodplains or river valleys. Dinosaur teeth and claws are also considered to be fossils. These items are sometimes found on their own, but they can also be preserved in dinosaur bone fossils. Teeth and claws, like other dinosaur fossils, can offer scientists important insights into the diet and behavior of dinosaurs.

Fossilized Dinosaur Track


A meteorite is a meteoroid that has survived its passage through the atmosphere and landed on the surface of a planet or other body. Meteoroids are small bodies in space, usually no more than a few meters in size. Most meteoroids are fragments of comets or asteroids. When they enter the atmosphere, they are heated by friction and create a streak of light, called a meteor or shooting star. However, sometimes meteoroids survive the journey through the atmosphere and land on the ground. These meteorites can be studied to learn about the composition of the solar system.

There are three main types of meteorites: iron meteorites, stone meteorites and stony-iron meteorites. Iron meteorites are made mostly of iron and nickel, and they are usually very heavy. Stone meteorites are made of silicate minerals, and they tend to be lighter than iron meteorites. Stony-iron meteorites contain both silicate minerals and iron-nickel metals. Meteorites can be found all over the world, but they are most commonly found in deserts or other areas where there is little vegetation to obscure them.

Meteorite Specimen

Meteoroids come in a wide range of sizes, from very small particles to large boulders. Most meteoroids that reach the Earth’s surface are no larger than a pebble, but they can cause considerable damage if they struck a human or a building.


If you have a collection of rocks or minerals, we’d like to hear from you. Nest Egg Auctions is capable of appraising and selling on consignment at auction, as well outright purchasing collections from sellers of rocks and minerals.

Contact Nest Egg Auctions today at 203-630-1400 or by sending us a message.

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