Spunky Blue Black Opal, .2 ct.

$30.00

This little black opal packs a big blue punch. Oval shaped with a medium cabochon, this gemstone was cut for custom jewelry, art or collection (.1570 x .1225 x .1010 in., .2 ct.).

Description

Black opal can cost $100 to $1,500 per carat.

Variety: Natural Black Opal Type 1
Body Tone: Black N1 (2)
Brightness: Average
Transparency: Opaque
Colour: Blue
Hue: Normal Tones
Outline: Oval Shape
Profle: Medium Cabochon
Origin: Lighting Ridge
Pattern: Blocky Pattern
Display: Weak or Blank 1 Angle
Distribution: 50 – 59%
Inclusions: No Inclusions
MOHS Scale: 4.5-6.5
Polish: 2.15+0.08-0.09
R.F.I.: 1.450+0.020
Spec Gravity: 1.98 – 2.25
Carat Weight: .20 Carats
Formula: Si02nH20
Fracture: Conchoidal – Uneven
Lustre: Vitreous – Resinous
Flourescence: May phosphoresce in long /short wave
Absorption: Spectra 660nm, 470nm
Category: Mineraloid (Amorphorous)
Crystal Habit: Irregular ‘nodular’ Veins
Composition: Hydroussilicondioxide.3-21%/weight
Crystal Form: Amorphous, pseudomorph, botryoidal