Dark Opal from Lightning Ridge with green, orange and gold. Oval shaped with a medium cabochon, this gemstone was cut for jewelry, art or collection (.2260 x .1790 x .1135 in., .44 ct.). 
Back of dark Opal from Lightning Ridge with green, orange and gold. Oval shaped with a medium cabochon, this gemstone was cut for jewelry, art or collection (.2260 x .1790 x .1135 in., .44 ct.). 

Flashy Dark Opal, .44 ct.

$296.02

Dark Opal from Lightning Ridge with green, orange and gold. Oval shaped with a medium cabochon, this gemstone was cut for jewelry, art or collection (.2260 x .1790 x .1135 in., .44 ct.).

SKU: BOD-2-3 Categories: , Tags: ,

Description

Dark opal value is set by play of color, brightness and pattern.

Variety: Natural Dark Opal Type 1
Body Tone: Dark N5 (10)
Brightness: Bright
Transparency: Transparent
Colour: Green-Orange
Hue: Normal Tones
Outline: Oval Shape
Profle: Medium Cabochon
Origin: Lighting Ridge
Pattern: Mixed Pattern
Display: Weak or Blank 1 Angle
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: .44 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’s body tone makes it more affordable than black opals.

View more dark opals.

Additional information

Weight 45 g
Dimensions 9 × 6.5 × 1.5 in
Color

Orange, Gold, Green
Shape

Oval

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