Crystals
Nuummite
Nuummite • metamorphic rock rich in amphiboles (gedrite & anthophyllite) Signature: shimmering schiller from ultra‑thin metallic lamellae (ilmenite/magnetite) Mohs: ~5.5–6 • SG: ~2.9–3.2 • Luster: sub‑vitreous; silky when fibrous Look:...
Nuummite
Nuummite • metamorphic rock rich in amphiboles (gedrite & anthophyllite) Signature: shimmering schiller from ultra‑thin metallic lamellae (ilmenite/magnetite) Mohs: ~5.5–6 • SG: ~2.9–3.2 • Luster: sub‑vitreous; silky when fibrous Look:...
Moldavite
Moldavite • Tektite (impact glass) Origin event: Nördlinger Ries impact, Germany Age: ~14.8 million years (Miocene) Strewn field: Czech Republic (Bohemia & Moravia) ± Austria/Germany Mohs ~5–5.5 • SG ~2.32–2.38...
Moldavite
Moldavite • Tektite (impact glass) Origin event: Nördlinger Ries impact, Germany Age: ~14.8 million years (Miocene) Strewn field: Czech Republic (Bohemia & Moravia) ± Austria/Germany Mohs ~5–5.5 • SG ~2.32–2.38...
Fulgurite
Fulgurite • “Fossilized Lightning” Lechatelierite (Amorphous SiO2) + Fused Sand Mohs ~6 (glass) • Extremely Fragile as Specimens Fulgurite ⚡ — Lightning‑Made Glass Tubes with a Wild, Branching Beauty A...
Fulgurite
Fulgurite • “Fossilized Lightning” Lechatelierite (Amorphous SiO2) + Fused Sand Mohs ~6 (glass) • Extremely Fragile as Specimens Fulgurite ⚡ — Lightning‑Made Glass Tubes with a Wild, Branching Beauty A...
Hessonite
Hessonite • Grossular Garnet Variety Formula: Ca3Al2(SiO4)3 Crystal System: Cubic (isometric) Mohs: ~6.5–7 • SG: ~3.57 RI ~1.74–1.76 • Singly refractive Nickname: “Cinnamon Stone” Hessonite — The Warm, Cinnamon‑Toned Garnet...
Hessonite
Hessonite • Grossular Garnet Variety Formula: Ca3Al2(SiO4)3 Crystal System: Cubic (isometric) Mohs: ~6.5–7 • SG: ~3.57 RI ~1.74–1.76 • Singly refractive Nickname: “Cinnamon Stone” Hessonite — The Warm, Cinnamon‑Toned Garnet...
Petrified wood
Petrified Wood • Silicified fossil wood (permineralization + replacement) Chemistry: SiO₂ (chalcedony/agate ± opal) • Minor iron/manganese/carbon Mohs ~6.5–7 (quartz‑grade) • SG ~2.58–2.64 Textures: Growth rings • Rays • Knots...
Petrified wood
Petrified Wood • Silicified fossil wood (permineralization + replacement) Chemistry: SiO₂ (chalcedony/agate ± opal) • Minor iron/manganese/carbon Mohs ~6.5–7 (quartz‑grade) • SG ~2.58–2.64 Textures: Growth rings • Rays • Knots...