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Crystal Encyclopedia

Proustite (Ruby Silver)

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Proustite is a sulfosalt mineral composed of silver, arsenic, and sulfur, with the chemical formula Ag₃AsS₃. Known for its striking deep red color and transparency, proustite often forms prismatic or rhombohedral crystals and can also appear as massive or granular aggregates. It is also referred to as “ruby silver” due to its vibrant hue and […]

Gahnite

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Gahnite is a mineral belonging to the spinel group, specifically a zinc aluminum oxide with the chemical formula ZnAl2O4ZnAl_2O_4ZnAl2​O4​. It is typically found in metamorphic and pegmatitic rocks and is known for its characteristic dark green, blue-green, or blue-black color, which can vary depending on its composition. Gahnite is generally opaque, although some translucent specimens […]

Paraíba Tourmaline

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Paraíba tourmaline is a rare and highly valued variety of tourmaline, renowned for its striking and vivid blue to greenish-blue colors. It is characterized by its vibrant hues, which are due to the presence of copper in its crystal structure, setting it apart from other tourmalines. This gemstone typically displays a rich, electric blue or […]

Baroque Pearls

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Baroque pearls are a captivating subset of pearls that have fascinated humanity for centuries. Unlike traditional round pearls, baroque pearls are distinguished by their irregular, often asymmetrical shapes and unique beauty. They are prized not only for their aesthetic appeal in jewelry but also for their geological and gemological significance. Contents The Geological Formation of […]

Teal Sapphire

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Teal sapphire, a captivating gem that exhibits hues of blue and green, has gained popularity in recent years due to its unique coloration and striking appearance. Unlike traditional blue sapphires, teal sapphires have a blend of colors ranging from sea-green to deep blue, sometimes with hints of yellow or gold. This unique mix, reminiscent of […]

Cloud Agate

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Cloud agate is a captivating variety of chalcedony, a form of microcrystalline quartz. It’s admired for its cloud-like patterns that seem to float within the stone, making it a favorite among collectors, jewelry makers, and spiritual practitioners. Often found in neutral shades like white, gray, and light blue, cloud agate is known for its subtle […]

Prase Quartz

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Prase quartz is a variety of quartz that is typically green in color, often owing its hue to the presence of amphibole inclusions or other mineral impurities. It has a unique and vibrant green shade that distinguishes it from other quartz varieties such as amethyst, citrine, or rose quartz. This rare form of quartz is […]