green black opal from Lightning Ridge cut round with a low cabochon. This gemstone is perfect for jewelry, art or collection (.197 x .181 x .118 in., .45 ct.).
Back of green black opal from Lightning Ridge cut round with a low cabochon. This gemstone is perfect for jewelry, art or collection (.197 x .181 x .118 in., .45 ct.).

Green Black Opal, .45 ct.

$316.02

Flashy green black opal from Lightning Ridge cut round with a low cabochon. This gemstone is perfect for jewelry, art or collection (.1970 x .1810 x .1180 in., .45 ct.).

SKU: BOD-1-5 Categories: , Tags: ,

Description

Black opal can reveal a number of colors.

Variety: Natural Black Opal Type 1
Body Tone: Black N3 (5)
Brightness: Bright
Transparency: Opaque
Colour: Green
Hue: Clear Strong Tones
Outline: Round
Profle: Low Cabochon
Origin: Lighting Ridge
Pattern: Broad Flash Pattern
Display: Weak or Blank 2 Angles
Distribution: Over 80%
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: .45 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

Opal is October’s birthstone.

View more black opals.

Additional information

Weight 45 g
Dimensions 9.5 × 6.5 × 1.5 in
Color

Gold, Green
Shape

Round

Related products