Fluorite, Hyalite Opal and Mica – NAM 010

Fluorite and hyalite opal on matrix rich in mica and schorl

Measurements: 78 x 70 x 50 mm

Description: Fluorite and hyalite opal sits on a matrix rich in mica and schorl.

The fluorite crystals have a few flaws.

The hyalite opal should fluoresce well under ultraviolet light.

Weight of Specimen: 122 g

Chemical Composition:  CaF₂ (fluorite)
                                       SiO₂•1.5(H₂O) (basic opal)
                                   KAl₂(Si₃Al)O₁₀(OH_,F)₂ (mica)
                                       NaFe²⁺₃Al₆Si₆O₁₈(BO₃)₃(OH)₄ (schorl)

Hardness on Mohs Scale:  (fluorite) 4
                                       (basic opal) 5.5 - 6
                                         (mica) 2-2.5
                                (schorl) 7.5

Location: Erongo, Namibia.

Specimen Code: NAM 010

R 500

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