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 | Reference mineral | Goethite |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | ● |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
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
针铁矿是一种含水氧化铁矿物，通常呈黄棕色至红棕色，具有金属至丝绢光泽。针铁矿在自然界分布极广，是土壤和岩石红棕色的主要来源之一。在宝石领域，含有针铁矿内含物的水晶（'黄幽灵'水晶）因其独特的金色内含物图案而备受珠宝界青睐。此外，针铁矿的纤维集合体有时也被用于制作装饰品。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Goethite?
针铁矿是一种含水氧化铁矿物，通常呈黄棕色至红棕色，具有金属至丝绢光泽。针铁矿在自然界分布极广，是土壤和岩石红棕色的主要来源之一。在宝石领域，含有针铁矿内含物的水晶（'黄幽灵'水晶）因其独特的金色内含物图案而备受珠宝界青睐。此外，针铁矿的纤维集合体有时也被用于制作装饰品。
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.