Goethite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.0 – 5.5
Specific Gravity
4.27 – 4.29
Refractive Index
2.26 – 2.398
Crystal System
Orthorhombic
Luster
Adamantine,Silky,Dull (Earthy),Metallic
Cleavage
Perfect
Fracture
Uneven,Splintery
Color
various
Birefringence
0.138
Pleochroism
Visible
Mohs Hardness
Mohs Hardness: 5.0 – 5.5
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Goethite
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 Goethite
괴타이트(침철석)는 철 옥시수산화물 광물로 흑색, 갈색, 황갈색의 다양한 색상을 보입니다. 토양과 풍화대에서 가장 흔한 철 광물로, 드물게 반금속 광택의 아름다운 결정이 발견됩니다. 수정이나 다른 광물에 내포물로 들어가 독특한 무늬 패턴을 만들기도 하며, 이런 내포 표본은 수집가들에게 인기가 있습니다.
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Goethite?
괴타이트(침철석)는 철 옥시수산화물 광물로 흑색, 갈색, 황갈색의 다양한 색상을 보입니다. 토양과 풍화대에서 가장 흔한 철 광물로, 드물게 반금속 광택의 아름다운 결정이 발견됩니다. 수정이나 다른 광물에 내포물로 들어가 독특한 무늬 패턴을 만들기도 하며, 이런 내포 표본은 수집가들에게 인기가 있습니다.
What is the hardness of Goethite?
Goethite has a Mohs hardness of 5.0 to 5.5, making it moderate for use in jewelry.
What color is Goethite?
Goethite is primarily Various.
How much does Goethite cost?
Goethite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Goethite?
Goethite belongs to the Orthorhombic crystal system.