
Demantoid Garnet
Crystal Encyclopedia
Demantoid garnet is a rare and highly sought-after variety of the mineral andradite, which belongs to the garnet group. Known for its exceptional brilliance and vibrant green color, demantoid garnet gets its name from the Dutch word “demant,” meaning…

Proustite (Ruby Silver)
Crystal Encyclopedia
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…

Gahnite
Crystal EncyclopediaGahnite is a mineral belonging to the spinel group, specifically a zinc aluminum oxide with the chemical formula ZnAl2O4ZnAl_2O_4ZnAl2O4. It is typically found in metamorphic and pegmatitic rocks and is known for its characteristic dark green, blue-green,…

Paraíba Tourmaline
Crystal Encyclopedia
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…

Baroque Pearls
Crystal EncyclopediaBaroque 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…

Teal Sapphire
Crystal Encyclopedia
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…

Cloud Agate
Crystal EncyclopediaCloud 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.…

Prase Quartz
Crystal EncyclopediaPrase 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…

Campitos Turquoise
Crystal EncyclopediaTurquoise is one of the oldest gemstones known to humanity, celebrated for its vivid blue-green hues and rich historical significance. It has been prized for thousands of years, not only for its beauty but also for its purported protective and healing…

Psilomelane
Crystal Encyclopedia
Psilomelane is a barium manganese oxide mineral, typically presenting as black or dark gray with a submetallic to dull luster. It often forms botryoidal or stalactitic masses, making it visually distinctive. As an important manganese ore, psilomelane…

Green Labradorite
Crystal EncyclopediaGreen labradorite is gemstone, known for its captivating play of colors, often referred to as labradorescence. This phenomenon is caused by the diffraction of light within the stone, which creates a shimmering effect in hues of green, blue, and sometimes…

Herkimer Diamonds
Crystal EncyclopediaHerkimer Diamonds are a unique form of double-terminated quartz crystals found primarily in Herkimer County, New York. Unlike typical quartz crystals that grow attached to a host rock, Herkimer Diamonds form as free-floating crystals within cavities of…