Jet
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Physical & Optical Properties
Category
Organic Gems
Mohs Hardness
2.5 – 4.0
Specific Gravity
1.19 – 1.35
Refractive Index
1.64 – 1.68
Crystal System
Amorphous
Luster
Waxy,Dull
Cleavage
None
Fracture
Conchoidal
Color
various
Pleochroism
Absent
Mohs Hardness
| Mohs | Reference mineral | Jet |
|---|---|---|
| 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 Jet
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About Jet
煤精（黑玉）是一种有机宝石材料，由古代木材经极高压力压实炭化而成，质地均匀细腻，颜色深黑而有光泽。煤精质轻，易于雕刻抛光，具有天鹅绒般的哑光至明亮的玻璃光泽。历史上，英国惠特比地区的煤精因品质卓越而享誉世界，在维多利亚时代的丧服珠宝中被广泛使用。如今煤精仍被用于制作项链、胸针等装饰品，在民俗和传统珠宝中深受欢迎。
On this page
Jewelry Use
Durability
1/10
Science FYI Family
Frequently Asked Questions
What is Jet?
煤精（黑玉）是一种有机宝石材料，由古代木材经极高压力压实炭化而成，质地均匀细腻，颜色深黑而有光泽。煤精质轻，易于雕刻抛光，具有天鹅绒般的哑光至明亮的玻璃光泽。历史上，英国惠特比地区的煤精因品质卓越而享誉世界，在维多利亚时代的丧服珠宝中被广泛使用。如今煤精仍被用于制作项链、胸针等装饰品，在民俗和传统珠宝中深受欢迎。
What is the hardness of Jet?
Jet has a Mohs hardness of 2.5 to 4.0, making it relatively soft for use in jewelry.
What color is Jet?
Jet is primarily Various.
How much does Jet cost?
Jet falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Jet?
Jet belongs to the Amorphous crystal system.