Crystals
Girasol
Optical description, not one mineral species Common opal: SiO2·nH2O Quartz: SiO2 Diffuse blue-white internal glow Cabochons, spheres, beads, and freeforms Girasol: Two Silica Materials, One Floating Internal Light Girasol is...
Girasol
Optical description, not one mineral species Common opal: SiO2·nH2O Quartz: SiO2 Diffuse blue-white internal glow Cabochons, spheres, beads, and freeforms Girasol: Two Silica Materials, One Floating Internal Light Girasol is...
Fluorite
Calcium fluoride Chemical formula CaF2 Isometric crystal system Perfect octahedral cleavage Mohs hardness 4 Fluorite: Cubic Color, Octahedral Cleavage, and the Mineral Behind Fluorescence Fluorite is calcium fluoride arranged in...
Fluorite
Calcium fluoride Chemical formula CaF2 Isometric crystal system Perfect octahedral cleavage Mohs hardness 4 Fluorite: Cubic Color, Octahedral Cleavage, and the Mineral Behind Fluorescence Fluorite is calcium fluoride arranged in...
Fuchsite
Chromium-rich muscovite K(Al,Cr)2(AlSi3O10)(OH)2 Monoclinic sheet silicate Mohs approximately 2–3 Aventurine and ruby-bearing associations Fuchsite: Chromium-Green Mica, Layered Light, and the Sparkle Inside Aventurine Fuchsite is the green, chromium-bearing variety of...
Fuchsite
Chromium-rich muscovite K(Al,Cr)2(AlSi3O10)(OH)2 Monoclinic sheet silicate Mohs approximately 2–3 Aventurine and ruby-bearing associations Fuchsite: Chromium-Green Mica, Layered Light, and the Sparkle Inside Aventurine Fuchsite is the green, chromium-bearing variety of...
Charoite
Complex hydrated silicate Monoclinic Fibrous charoitite Mohs 5–6 Murun Massif, Siberia Charoite: Violet Fibers, Siberian Stone Rivers, and Silky Mineral Motion Charoite is a rare purple mineral best known through...
Charoite
Complex hydrated silicate Monoclinic Fibrous charoitite Mohs 5–6 Murun Massif, Siberia Charoite: Violet Fibers, Siberian Stone Rivers, and Silky Mineral Motion Charoite is a rare purple mineral best known through...
Citrine
Quartz family Yellow to orange quartz SiO2 Mohs 7 Trigonal crystal system Citrine: Golden Quartz of Warmth, Clarity, and Radiant Structure Citrine is the yellow-to-orange variety of quartz, valued for...
Citrine
Quartz family Yellow to orange quartz SiO2 Mohs 7 Trigonal crystal system Citrine: Golden Quartz of Warmth, Clarity, and Radiant Structure Citrine is the yellow-to-orange variety of quartz, valued for...
Aquamarine
Blue to blue-green beryl Be3Al2Si6O18 Hexagonal crystal system Mohs 7.5–8 Iron-colored silicate March birthstone Aquamarine: Sea-Blue Beryl, Hexagonal Light, and the Clarity of Pegmatite Crystals Aquamarine is the blue to...
Aquamarine
Blue to blue-green beryl Be3Al2Si6O18 Hexagonal crystal system Mohs 7.5–8 Iron-colored silicate March birthstone Aquamarine: Sea-Blue Beryl, Hexagonal Light, and the Clarity of Pegmatite Crystals Aquamarine is the blue to...