Black Opal
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The most valuable and coveted variety of precious opal, black opal is set apart by a dark body tone, ranging from dark gray to jet black, that intensifies the spectral play-of-color dancing across its surface. Its premier source is Lightning Ridge in New South Wales, Australia, which yields stones showing vivid red, green, blue, and purple fire against a near-black background. An amorphous form of hydrated silica, it measures 6.0 to 6.5 on the Mohs scale. Top-grade Lightning Ridge material can exceed the per-carat value of diamond; though classed among the semi-precious gems and priced in the moderate tier, the finest examples reach well beyond it, for the darkness of the background is precisely what allows the opal's fire to read so saturated.
Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.0 – 6.5
Specific Gravity
1.97 – 2.22
Refractive Index
1.37 – 1.47
Crystal System
Amorphous
Luster
Vitreous
Cleavage
None
Fracture
Conchoidal
Color
white
Pleochroism
Absent
Mohs Hardness
Mohs Hardness: 6.0 – 6.5
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Moderate ($50-500/ct)
Where to Buy Black Opal
Blue Nile
Fine jewelry retailer
James Allen
Gemstone jewelry
Brilliant Earth
Ethically sourced gems
Amazon
Wide selection
Links may earn a commission at no extra cost to you.
About Black Opal
흑색 오팔은 오팔 중에서 가장 귀하고 가치 있는 품종으로, 어두운 배경색(검은색, 짙은 청색, 녹색) 위에 선명하게 나타나는 화려한 유색(遊色) 효과가 특징입니다. 호주 뉴사우스웨일스 주의 라이트닝 리지(Lightning Ridge)가 세계 최고 품질 흑색 오팔의 주요 산지입니다. '레드온블랙(Red on Black)' 색상 패턴의 흑색 오팔이 최고 등급으로 평가받습니다.
Compare With
Origins
Jewelry Use
Durability
5/10
Science FYI Family
Frequently Asked Questions
What is Black Opal?
흑색 오팔은 오팔 중에서 가장 귀하고 가치 있는 품종으로, 어두운 배경색(검은색, 짙은 청색, 녹색) 위에 선명하게 나타나는 화려한 유색(遊色) 효과가 특징입니다. 호주 뉴사우스웨일스 주의 라이트닝 리지(Lightning Ridge)가 세계 최고 품질 흑색 오팔의 주요 산지입니다. '레드온블랙(Red on Black)' 색상 패턴의 흑색 오팔이 최고 등급으로 평가받습니다.
What is the hardness of Black Opal?
Black Opal has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Black Opal?
Black Opal is primarily White.
Where is Black Opal found?
Black Opal is found in Lightning Ridge (Australia).
How much does Black Opal cost?
Black Opal falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.