Main Categories
Hemimorphite
Hemimorphite is a hydrous zinc silicate mineral, historically classified as calamine. It is known for its unique hemimorphic crystals, which exhibit different terminations at each end. It commonly forms blue-white crystalline crusts, fibrous aggregates, and botryoidal masses, and is a minor ore of zinc.
Grandidierite
Grandidierite is an extremely rare, bluish-green mineral first discovered in Madagascar in 1902. It is strongly trichroic, displaying dark blue-green, colorless, and dark green from different angles. Large, transparent faceted specimens are among the rarest of all collectible gemstones in the world.
Demantoid Garnet
Demantoid is a rare, vibrant green variety of andradite garnet, colored by chromium. It is renowned for its exceptional brilliance and dispersion (fire), often exceeding that of diamond. The finest historical specimens come from Russia's Ural Mountains and may undergo undetectable heat treatment.
Coral
Coral is a colonial marine invertebrate where countless identical polyps secrete calcium carbonate to build a shared, hard skeleton. These colonies grow asexually and also reproduce through synchronized spawning. The skeletal remains of these colonies are harvested and polished into organic gemstones.
Color-Change Fluorite
Color-change fluorite is renowned for its dramatic hue shift from vivid blue under fluorescent light to rich purple under incandescent light. This captivating phenomenon makes it a favorite for unique jewelry, though its softness requires protective settings in pieces like pendants and earrings.
Chrome Tourmaline
Chrome tourmaline is a rare, chromium-rich variety discovered in Tanzania in the 1960s. Its vibrant, emerald-like green color is highly prized by collectors. Not all green tourmalines are chrome tourmaline; the presence of chromium creates a notably brighter and more saturated hue.
Bloodstone
Bloodstone is a cryptocrystalline quartz aggregate, typically an opaque green jasper with vivid red hematite inclusions resembling blood spots. Also known as heliotrope, this semiprecious gemstone is prized for its unique appearance and should not be confused with similarly named ornamental stones.
Aragonite
Aragonite is one of the three common natural crystal forms of calcium carbonate, alongside calcite and vaterite. It forms through both biological and environmental processes. Its distinct orthorhombic structure often creates acicular, columnar, or branching fibrous crystals, sometimes in pseudo-hexagonal shapes.
Andesine Labradorite
Andesine-Labradorite is a crystalline gemstone blending two feldspar minerals. Its name honors their discovery locations: the Andes Mountains and Labrador, Canada. The hyphen denotes its chemical composition, which falls precisely between pure andesine and labradorite, resulting in its unique and descriptive classification.
Actinolite Cat's Eye
Actinolite cat's eye is a rare, translucent green gemstone prized for its sharp chatoyant "eye" effect. This phenomenon is caused by aligned fibrous inclusions within the mineral. It is sometimes mistaken for, but is distinct from, nephrite jade in both composition and optical properties.
