Dyed howlite or magnesite cabochon
Howlite, Ca₂B₅SiO₉(OH)₅; commonly dyed vivid blue to imitate turquoise
mineral
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Mineral (Evaporite)
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Dyed blue howlite or magnesite cabochon
Howlite (Ca₂B₅SiO₉(OH)₅), possibly magnesite (MgCO₃), artificially dyed blue
mineral
Tumbled howlite (likely)
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Blue-dyed howlite beads (likely)
Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise
mineral
Satin Spar (commercially called Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Selenite (gypsum crystal)
Gypsum, CaSO₄·2H₂O; variety selenite
mineral
Raw yellow calcite
Calcite, calcium carbonate (CaCO₃)
mineral
Orange calcite (likely polished or naturally rounded fragments)
Calcite, calcium carbonate (CaCO₃)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Orange Satin Spar (Satin Spar Selenite)
Satin Spar - Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Dyed turquoise-colored howlite or magnesite (likely imitation turquoise)
Howlite: Ca₂B₅SiO₉(OH)₅; magnesite: MgCO₃
mineral
Sulfur
Native Sulfur (S8)
mineral
Turquoise-colored howlite (likely dyed), polished cabochon
Howlite, Ca₂B₅SiO₉(OH)₅; the blue color is commonly added dye, though stabilized or imitation turquoise cannot be ruled out visually.
mineral
Honey calcite (likely rough calcite)
Calcite, calcium carbonate (CaCO₃)
mineral
Pink Howlite (Dyed)
Dyed Howlite / Silicoborocalcite (Ca2B5SiO9(OH)5)
mineral
Halite (Rock Salt) Crust
Sodium Chloride (NaCl)
sedimentary
Tumbled howlite (likely)
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Howlite
Howlite (calcium borosilicate hydroxide; Ca2B5SiO9(OH)5)
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral
Blue-green calcite
Calcite (CaCO₃), likely a pale aqua variety
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Howlite, Hematite, and Black Onyx Bracelet
Ca2B5SiO9(OH)5, Fe2O3, and SiO2
gemstone
Dyed blue howlite or magnesite (tumbled stone)
Howlite: Ca₂B₅SiO₉(OH)₅; commonly sold dyed blue to imitate turquoise
mineral
Tumbled white stone, possibly howlite or magnesite
Howlite: Ca₂B₅SiO₉(OH)₅; possible magnesite: MgCO₃
mineral
Blue Celestite (with Galena)
Strontium sulfate (SrSO4) and Lead sulfide (PbS)
mineral
Gypsum (selenite and satin-spar varieties)
Gypsum, CaSO₄·2H₂O
mineral
Selenite desert rose
Gypsum (CaSO₄·2H₂O), rosette habit
mineral
Desert rose
Gypsum (selenite) rosette, CaSO₄·2H₂O
mineral
Sulfur crystals on iron-rich matrix
Native sulfur (S₈), likely with iron oxides/hydroxides such as limonite
mineral
Calcite
Calcite (CaCO₃), likely massive crystalline calcite
mineral
Dyed blue howlite cabochon
Howlite, Ca₂B₅SiO₉(OH)₅; commonly dyed vivid blue and sold as “turquenite”
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Celestite (Celestine) Druze on Agate/Host Rock
Strontium sulfate (SrSO4)
mineral
Howlite
Howlite — Ca₂B₅SiO₉(OH)₅
mineral
Clear calcite cleavage fragment
Calcite (calcium carbonate, CaCO₃)
mineral
Satin Spar (often marketed as Selenite)
Fibrous Gypsum (CaSO4·2H2O)
mineral
Turquenite (Dyed Howlite)
Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)
mineral
Aragonite crystal cluster
Aragonite, orthorhombic CaCO₃
mineral
Yellow calcite (likely honey/yellow calcite)
Calcite, calcium carbonate (CaCO₃)
mineral
Tumbled howlite
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Aragonite cluster
Aragonite, CaCO₃ (orthorhombic polymorph of calcite)
mineral
Calcite
Calcite (calcium carbonate, CaCO₃), likely massive or crystalline limestone-derived material
mineral