Kristalopedia
Celestinas
Celestine (also called celestite) Strontium sulfate • SrSO4 Orthorhombic • Mohs 3–3.5 • SG ~3.9 Celestine 🌤️ — sky-blue crystals, calm light, and a touch of "heavenliness" Soothing like the...
Celestinas
Celestine (also called celestite) Strontium sulfate • SrSO4 Orthorhombic • Mohs 3–3.5 • SG ~3.9 Celestine 🌤️ — sky-blue crystals, calm light, and a touch of "heavenliness" Soothing like the...
Moldavitas
Moldavite • Tektite (impact glass) Origin event: Nördlinger Ries impact, Germany Age: ~14.8 million years (Miocene) Dispersal field: Czech Republic (Bohemia and Moravia) ± Austria/Germany Mohs ~5–5.5 • SG ~2.32–2.38...
Moldavitas
Moldavite • Tektite (impact glass) Origin event: Nördlinger Ries impact, Germany Age: ~14.8 million years (Miocene) Dispersal field: Czech Republic (Bohemia and Moravia) ± Austria/Germany Mohs ~5–5.5 • SG ~2.32–2.38...
Black onyx
Black onyx • straight-banded chalcedony (microcrystalline SiO₂) Palette: black base with white/gray "cap" (suitable for cameos) • also solid black cabochons Mohs: ~6.5–7 • SG: ~2.58–2.64 • Luster: waxy–glassy •...
Black onyx
Black onyx • straight-banded chalcedony (microcrystalline SiO₂) Palette: black base with white/gray "cap" (suitable for cameos) • also solid black cabochons Mohs: ~6.5–7 • SG: ~2.58–2.64 • Luster: waxy–glassy •...
Magnetite
Magnetite • Fe3O4 • Inverse spinel Crystal system: isometric (cubic) Mohs ~5.5–6.5 • SG ~5.1–5.2 Streak color: black • Luster: metallic–submetallic Magnetism: strongly magnetic (ferrimagnetic) Magnetite — the mineral that...
Magnetite
Magnetite • Fe3O4 • Inverse spinel Crystal system: isometric (cubic) Mohs ~5.5–6.5 • SG ~5.1–5.2 Streak color: black • Luster: metallic–submetallic Magnetism: strongly magnetic (ferrimagnetic) Magnetite — the mineral that...
Blue tiger's eye
Quartz variety (cat's eye effect) "Hawk's eye" • Crocidolite → quartz pseudomorph Mohs 7 • SiO2 Blue tiger's eye 💙🪶 — the calm of a hawk's gaze, steel-blue glow Smooth...
Blue tiger's eye
Quartz variety (cat's eye effect) "Hawk's eye" • Crocidolite → quartz pseudomorph Mohs 7 • SiO2 Blue tiger's eye 💙🪶 — the calm of a hawk's gaze, steel-blue glow Smooth...
Citrine
Citrine • quartz variety (SiO2) Trigonal • uniaxial (+) Mohs 7 • hard and scratch resistant Color: from light lemon yellow → to "Madeira" orange Birthstone: November (along with topaz)...
Citrine
Citrine • quartz variety (SiO2) Trigonal • uniaxial (+) Mohs 7 • hard and scratch resistant Color: from light lemon yellow → to "Madeira" orange Birthstone: November (along with topaz)...