Dark opal with orange, green and purple mined in Lightning Ridge. Triangle cut with a medium cabochon for jewelry, art or collection (.3925 x .2350 x .0910)
Second side of dark opal with orange, green and purple mined in Lightning Ridge. Triangle cut with a medium cabochon for jewelry, art or collection (.3925 x .2350 x .0910)

Dark Opal Gemstone Triangle, .8 ct.

$76.65

Distinctive dark opal with orange, green and purple mined in Lightning Ridge. Triangle cut with a medium cabochon for jewelry, art or collection (.3925 x .2350 x .0910)

SKU: BOD-1-12 Categories: , Tags: ,

Description

Dark opal is lighter than black opal and darker than white opal.

Variety: Natural Dark Opal Type 1
Body Tone: Dark N6 (13)
Brightness: Average
Transparency: Translucent
Colour: Orange-Green
Hue: Normal Tones
Outline: Triangle
Profle: Medium Cabochon
Origin: Lighting Ridge
Pattern: Mixed Pattern
Display: Weak or Blank 1 Angle
Distribution: 50 – 59%
Inclusions: 5% of Face
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: .80 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

Dark opal is a great choice if you don’t have a black opal budget.

View more dark opals.

Additional information

Weight 45 g
Dimensions 9 × 6.5 × 1.5 in
Color

Orange, Green, Purple
Shape

Triangle

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