Kristalopedia
Wisdom tooth
Shark and ray teeth (fossils) • bioapatite → rich fluorapatite mineralization The hardest part of a shark • skeleton — cartilaginous → teeth dominate the fossil record Mohs ≈ 5...
Wisdom tooth
Shark and ray teeth (fossils) • bioapatite → rich fluorapatite mineralization The hardest part of a shark • skeleton — cartilaginous → teeth dominate the fossil record Mohs ≈ 5...
Sea urchin
Sea urchin fossils • class Echinoidea (phylum Echinodermata) Time range: Ordovician → present (≈ 450+ million years) Distinguishing feature: fivefold symmetry of “regular” ones; petal patterns and bilateral symmetry of...
Sea urchin
Sea urchin fossils • class Echinoidea (phylum Echinodermata) Time range: Ordovician → present (≈ 450+ million years) Distinguishing feature: fivefold symmetry of “regular” ones; petal patterns and bilateral symmetry of...
Dinosaur bone
Dinosaur bone • vertebrate fossil Agatized / permineralized ("gembone") Age: Late Triassic–Cretaceous (depends on [lokalitetas]) Hardness: ~6.5–7 (silicon dioxide) • ~3–4 (calcite) Dinosaur bone 🦴 — Ancient architecture in mosaic...
Dinosaur bone
Dinosaur bone • vertebrate fossil Agatized / permineralized ("gembone") Age: Late Triassic–Cretaceous (depends on [lokalitetas]) Hardness: ~6.5–7 (silicon dioxide) • ~3–4 (calcite) Dinosaur bone 🦴 — Ancient architecture in mosaic...
Brucitas
Magnesium hydroxide • Mg(OH)2 Trigonal • Layered plates Mohs ~2.5–3 • SG ~2.3–2.4 Brucite 🌿 — gentle shine, layered chemistry, and that dreamy sky blue Softly silky, sometimes bright blue...
Brucitas
Magnesium hydroxide • Mg(OH)2 Trigonal • Layered plates Mohs ~2.5–3 • SG ~2.3–2.4 Brucite 🌿 — gentle shine, layered chemistry, and that dreamy sky blue Softly silky, sometimes bright blue...
Synthetic aventurine
Synthetic aventurine • aventurine glass ("goldstone/aventurina") — sodium–calcium–silicon dioxide glass with reflective crystals Formula (base): ~Na₂O–CaO–SiO₂ • Reflectors: usually copper (golden/brown); other recipes use chromium/cobalt in the glass matrix Crystal...
Synthetic aventurine
Synthetic aventurine • aventurine glass ("goldstone/aventurina") — sodium–calcium–silicon dioxide glass with reflective crystals Formula (base): ~Na₂O–CaO–SiO₂ • Reflectors: usually copper (golden/brown); other recipes use chromium/cobalt in the glass matrix Crystal...
Zeolites
Zeolites • mineral group of hydrated aluminosilicates with open framework structures General formula: Mₓ/n[AlₓSiᵧO₂(ₓ₊ᵧ)]·wH₂O (M = Na, K, Ca, etc.; water in channels) Crystal systems: various (monoclinic / orthorhombic /...
Zeolites
Zeolites • mineral group of hydrated aluminosilicates with open framework structures General formula: Mₓ/n[AlₓSiᵧO₂(ₓ₊ᵧ)]·wH₂O (M = Na, K, Ca, etc.; water in channels) Crystal systems: various (monoclinic / orthorhombic /...