Kristalopedia
Apatites
Phosphate mineral (apatite group) Hexagonal • Mohs ~5 Ca5(PO4)3(F,Cl,OH) Apatite 💙 — neon ocean blue, science you’ll love, and everyday ways to enjoy it Bright as a tropical lagoon and...
Apatites
Phosphate mineral (apatite group) Hexagonal • Mohs ~5 Ca5(PO4)3(F,Cl,OH) Apatite 💙 — neon ocean blue, science you’ll love, and everyday ways to enjoy it Bright as a tropical lagoon and...
Aquamarine
Beryl family • Be3To the2Yes6O18 Hexagonal • prismatic crystals Mohs 7.5–8 Aquamarine 🌊 — transparent blue calm you can wear As soothing as a quiet seaside and sturdy enough for...
Aquamarine
Beryl family • Be3To the2Yes6O18 Hexagonal • prismatic crystals Mohs 7.5–8 Aquamarine 🌊 — transparent blue calm you can wear As soothing as a quiet seaside and sturdy enough for...
Hematite
Hematite • Fe₂O₃ — iron(III) oxide Crystal system: trigonal • Forms: massive, botryoidal (“kidney ore”), micaceous “specularite”, platy crystals Mohs: ~5.5–6.5 • SG: ~5.2–5.3 (clearly heavy) Streak color: reddish brown...
Hematite
Hematite • Fe₂O₃ — iron(III) oxide Crystal system: trigonal • Forms: massive, botryoidal (“kidney ore”), micaceous “specularite”, platy crystals Mohs: ~5.5–6.5 • SG: ~5.2–5.3 (clearly heavy) Streak color: reddish brown...
Pomegranate
Garnet group • cubic (isometric) SiO4 silicates • solid solution family Mohs ~6.5–7.5 • tough • no cleavage Garnet ❤️ — from pomegranate reds to electric greens (and why it's...
Pomegranate
Garnet group • cubic (isometric) SiO4 silicates • solid solution family Mohs ~6.5–7.5 • tough • no cleavage Garnet ❤️ — from pomegranate reds to electric greens (and why it's...
Carnelian
"Carnelian (also called cornelian) • orange–red chalcedony (microcrystalline SiO₂) variety" "Color cause: Fe³⁺ (iron oxides/hydroxides — hematite/goethite) + natural / artificially induced heat" "Mohs: ~6.5–7 • SG: ~2.58–2.64 • Luster:...
Carnelian
"Carnelian (also called cornelian) • orange–red chalcedony (microcrystalline SiO₂) variety" "Color cause: Fe³⁺ (iron oxides/hydroxides — hematite/goethite) + natural / artificially induced heat" "Mohs: ~6.5–7 • SG: ~2.58–2.64 • Luster:...
Kianitas
Kyanite (also called distene) • Al₂SiO₅ • one of the Al-silicate polymorphs Crystal system: triclinic • Habit: blade-shaped, radial Distinctiveness: anisotropic hardness — softer along, harder across Relatives: andalusite (low...
Kianitas
Kyanite (also called distene) • Al₂SiO₅ • one of the Al-silicate polymorphs Crystal system: triclinic • Habit: blade-shaped, radial Distinctiveness: anisotropic hardness — softer along, harder across Relatives: andalusite (low...