Aragonite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
3.5 – 4.0
Specific Gravity
2.93 – 2.96
Refractive Index
1.525 – 1.686
Crystal System
Orthorhombic
Luster
Vitreous
Cleavage
Distinct
Fracture
Sub-Conchoidal
Color
various
Birefringence
0.155
Pleochroism
Strong
Mohs Hardness
| Mohs | Reference mineral | Aragonite |
|---|---|---|
| 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 Aragonite
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 Aragonite
アラゴナイトは、尖った擬六方晶の結晶集合体・鍾乳石・礁岩を形成する方解石の多形体（炭酸カルシウム）です。真珠・サンゴ・貝殻の主要構成成分であり、生体鉱物学的に重要な鉱物です。スペインのアラゴン地方が命名の由来で、黄・白・橙・青色の結晶が宝石標本として評価されています。
On this page
Jewelry Use
Durability
2/10
Science FYI Family
Frequently Asked Questions
What is Aragonite?
アラゴナイトは、尖った擬六方晶の結晶集合体・鍾乳石・礁岩を形成する方解石の多形体（炭酸カルシウム）です。真珠・サンゴ・貝殻の主要構成成分であり、生体鉱物学的に重要な鉱物です。スペインのアラゴン地方が命名の由来で、黄・白・橙・青色の結晶が宝石標本として評価されています。
What is the hardness of Aragonite?
Aragonite has a Mohs hardness of 3.5 to 4.0, making it relatively soft for use in jewelry.
What color is Aragonite?
Aragonite is primarily Various.
How much does Aragonite cost?
Aragonite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Aragonite?
Aragonite belongs to the Orthorhombic crystal system.