Handmade Natural Gemstone Opal Cabochon and Polished Sterling Silver Dangle and Drop Earrings, Welo Opal Silver Dangle and Drop Earrings,


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Handcrafted Sterling Silver Earrings with Natural Ethiopian Opal Gemstones.

Earring size is 2.20 x 0.80 cm.

The earring weight is 4.50gm.

Gemstone Description: Opal
A blue-green section of opal encased inside a light brown rock
A rich seam of iridescent opal encased in matrix
Category Mineraloid
(repeating unit) Hydrated silica. SiO2·nH2O
Crystal system Amorphous[1] Identification
Color Colorless, white, yellow, red, orange, green, brown, black, blue, pink
Crystal habit Irregular veins, in masses, in nodules
Cleavage None[1] Fracture Conchoidal to uneven[1] Mohs scale hardness 5.5–6[1] Luster Subvitreous to waxy[1] Streak White
Diaphaneity opaque, translucent, transparent
Specific gravity 2.15+0.08
−0.90[1] Density 2.09 g/cm3
Polish luster Vitreous to resinous[1] Optical properties Single refractive, often anomalous double refractive due to strain[1] Refractive index 1.450+0.020
Mexican opal may read as low as 1.37, but typically reads 1.42–1.43[1] Birefringence none[1] Pleochroism None[1] Ultraviolet fluorescence black or white body color: inert to white to moderate light blue, green, or yellow in long and short wave, may also phosphoresce, common opal: inert to strong green or yellowish-green in long and short wave, may phosphoresce; fire opal: inert to moderate greenish-brown in long and short wave, may phosphoresce[1] Absorption spectra green stones: 660 nm, 470 nm cutoff[1] Diagnostic features darkening upon heating
Solubility hot saltwater, bases, methanol, humic acid, hydrofluoric acid

Ethiopian Opal Round Shape – 8mm Cabochon polished