Coral: Corals are the supporting framework of small polyps. Each coral polyp, a tiny marine animal that lives in enormous colonies, extracts calcium carbonate from the sea and exudes it through their bases to build a protective home around and above itself. Each generation of polyps dies in its protective home and each succeeding generation builds on top of its predecessor. They precipitate calcareous m (read full)

Euclase: Euclase is a silicate with a monoclinic crystal system. It is considered a very rare gem of light blue color. It appears as long or short prismatic crystals, flattened and transparent. It is colorless, white, green, or blue, commonly a pale aquamarine or green, but crystals of a very fine dark blue (from iron) have been found at the Miami mine in Zimbabwe. Crystals are often striated. It (read full)

Hambergite: Hambergite is a beryllium borate mineral in the classification of Nitrates, Carbonates, and Borates and is an extremely rare gemstone. It occurs as transparent colourless orthorhombic prismatic crystals which are usually well crystallized, sometimes twinned. Its colors range to white, white grayish, and yellowish white. Crystals are striated along the prisms. It is very hard and has one directi (read full)

Heliodor Beryl: Heliodor is a gem variety of Beryl with golden-yellow or light yellow-green color. In many cases heliodor is also used to include gems known as Golden beryl/ Golden emerald, though not to be confused with gold beryl. It is sometimes hard to establish a dividing line between heliodor and golden beryl. Its main characteristic is its color, which is the yellow-green of olive oil. Its pigment is uran (read full)

Jet Lignite: Jet is an organic gem material composed of lignite, and is a bituminous coal which can be polished. It is compact, homogeneous, has a hard, glossy surface and black interior variety of fossilized lignite or coal. It is an opaque black coalified fossilized drift wood from the coniferlike, 180 million years old 'Araucaria' or monkey puzzle tree that has been dried and fractured following death of (read full)

Ammolite: Ammolite is an organic gemstone made from the fossilized shells of ammonites, which are extinct marine mollusks. Found primarily in the Bearpaw Formation of Alberta, Canada, ammolite displays iridescent colors ranging from red and green to blue and violet. It is often used in jewelry as cabochons or doublets/triplets for added durability.With a hardness of 3.5 to 4.5 on the Mohs scale, ammolite sh (read full)

Pearl: Pearls are organic gemstones formed within the soft tissue of living mollusks. They are composed primarily of aragonite (a form of calcium carbonate) and conchiolin. Pearls can be natural or cultured and come in various colors, including white, cream, pink, silver, and black.With a hardness of 2.5 to 4.5 on the Mohs scale, pearls are relatively soft and should be handled with care. (read full)

Abalone Pearl: Abalone pearls are natural pearls produced by the marine mollusk abalone. They are known for their unique shapes and vibrant iridescent colors, including blues, greens, and pinks. Abalone pearls are rare and are often used in unique jewelry pieces.With a hardness of 2.5 to 4.5 on the Mohs scale, they are soft and require careful handling. (read full)

Jeremejevite: Jeremejevite is a rare aluminum borate mineral that can be colorless, blue, or yellow. It was first discovered in Siberia and is known for its hardness and brilliance. Facetable material is extremely rare, making jeremejevite a prized collector's gemstone.With a hardness of 6.5 to 7.5 on the Mohs scale, it is suitable for jewelry but is rarely used due to its rarity. (read full)

Poudretteite: Poudretteite is an extremely rare gemstone that was first discovered in the Poudrette quarry of Mont Saint-Hilaire, Quebec, Canada. It is typically pink to colorless and has good transparency.With a hardness of 5 on the Mohs scale, poudretteite is relatively soft and is mainly a collector's gemstone. (read full)

Benitoite: Benitoite is a rare blue barium titanium silicate mineral found primarily in San Benito County, California. Known for its high dispersion and sapphire-like color, benitoite fluoresces bright blue under short-wave ultraviolet light.With a hardness of 6 to 6.5 on the Mohs scale, it is suitable for jewelry but should be worn with care. (read full)

Musgravite: Musgravite is one of the rarest gemstones in the world, belonging to the taaffeite family. It ranges in color from greyish purple to green and was first discovered in the Musgrave Ranges of Australia.With a hardness of 8 to 8.5 on the Mohs scale, musgravite is suitable for jewelry but is extremely rare. (read full)

Clinohumite: Clinohumite is a rare gemstone found in metamorphic rocks, displaying colors from yellow to orange-brown. It is part of the humite group of minerals and is valued for its rarity and color.With a hardness of 6 on the Mohs scale, clinohumite is suitable for jewelry but is relatively soft. (read full)

Gem Silica: Gem silica, also known as chrysocolla chalcedony, is a rare and valuable form of chalcedony colored by chrysocolla. It displays vivid blue to green hues and has a waxy luster.With a hardness of 7 on the Mohs scale, gem silica is suitable for all types of jewelry. (read full)

Maw Sit Sit: Maw Sit Sit is a unique gemstone from Myanmar composed of jadeite, albite, and kosmochlor, among other minerals. It exhibits bright green with dark green to black veining and spots.With a hardness of 6 to 7 on the Mohs scale, maw sit sit is suitable for various types of jewelry. (read full)

Azurite-Malachite: Azurite-malachite is a combination of azurite and malachite minerals, creating a striking blue and green patterned gemstone. The two minerals often occur together due to their similar formation conditions.With a hardness of 3.5 to 4 on the Mohs scale, it is relatively soft and used in jewelry with care. (read full)