Iris Agate
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5 – 7.0
Specific Gravity
2.55 – 2.7
Refractive Index
1.53 – 1.543
Crystal System
Trigonal
Luster
Waxy
Color
various
Birefringence
0.008
Mohs Hardness
| Mohs | Reference mineral | Iris Agate |
|---|---|---|
| 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
Moderate ($50-500/ct)
Where to Buy Iris Agate
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 Iris Agate
彩虹玛瑙（虹彩玛瑙）是玛瑙的一种特殊光学变体，当光线以特定角度穿透极薄的玛瑙切片时，会在其细密的同心环状层带中发生衍射，产生七彩虹般的光谱色彩。彩虹玛瑙通常以切薄片的形式呈现，正面朝光时即可看到彩虹色彩的绽放。这一效果的产生需要玛瑙的层带厚度恰好在可见光波长范围内，因此并非所有玛瑙均可产生虹彩效应，产量有限，具有一定的收藏价值。
On this page
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Iris Agate?
彩虹玛瑙（虹彩玛瑙）是玛瑙的一种特殊光学变体，当光线以特定角度穿透极薄的玛瑙切片时，会在其细密的同心环状层带中发生衍射，产生七彩虹般的光谱色彩。彩虹玛瑙通常以切薄片的形式呈现，正面朝光时即可看到彩虹色彩的绽放。这一效果的产生需要玛瑙的层带厚度恰好在可见光波长范围内，因此并非所有玛瑙均可产生虹彩效应，产量有限，具有一定的收藏价值。
What is the hardness of Iris Agate?
Iris Agate has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Iris Agate?
Iris Agate is primarily Various.
How much does Iris Agate cost?
Iris Agate falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Iris Agate?
Iris Agate belongs to the Trigonal crystal system.