Common Opal
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.5 – 6.5
Specific Gravity
1.98 – 2.5
Refractive Index
1.37 – 1.52
Crystal System
Amorphous
Luster
Wood Opal
Cleavage
None
Fracture
Conchoidal,Splintery
Color
white
Pleochroism
Absent
Mohs Hardness
Mohs Hardness: 5.5 – 6.5
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Common 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 Common Opal
보통 오팔(포타치 오팔)은 유색(遊色) 효과가 없는 불투명 또는 반투명 오팔로, '포타치 오팔(Potch Opal)'이라고도 합니다. 백색, 황색, 녹색, 청색, 적색 등 다양한 색상을 보이며, 유색 효과가 있는 귀오팔과 구별됩니다. 전 세계적으로 광범위하게 산출되며, 카보숑으로 가공하면 우유빛 유백 광택이 특징입니다. 저렴한 보석 소재로 널리 활용됩니다.
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Common Opal?
보통 오팔(포타치 오팔)은 유색(遊色) 효과가 없는 불투명 또는 반투명 오팔로, '포타치 오팔(Potch Opal)'이라고도 합니다. 백색, 황색, 녹색, 청색, 적색 등 다양한 색상을 보이며, 유색 효과가 있는 귀오팔과 구별됩니다. 전 세계적으로 광범위하게 산출되며, 카보숑으로 가공하면 우유빛 유백 광택이 특징입니다. 저렴한 보석 소재로 널리 활용됩니다.
What is the hardness of Common Opal?
Common Opal has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is Common Opal?
Common Opal is primarily White.
How much does Common Opal cost?
Common Opal falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Common Opal?
Common Opal belongs to the Amorphous crystal system.