Vivianite
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Physical & Optical Properties
Category
Collector Gems
Mohs Hardness
1.5 – 2.0
Specific Gravity
2.64 – 2.7
Refractive Index
1.56 – 1.64
Crystal System
Monoclinic
Luster
Vitreous,Pearly,Dull (Earthy)
Cleavage
Perfect
Color
various
Birefringence
0.054
Pleochroism
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.
Mohs Hardness
| Mohs | Reference mineral | Vivianite |
|---|---|---|
| 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 Vivianite
Links may earn a commission at no extra cost to you.
About Vivianite
ビビアナイトは含水鉄リン酸塩鉱物で、採掘直後は無色から淡黄緑色ですが、光への暴露で急速に深い青から青緑、そして暗青‐黒色へと色変化する顕著な性質で知られます。この色変化は鉄の酸化によるもので、泥炭湿地・沼沢地堆積物・鉱床の酸化帯に産出します。ブラジルのミナスジェライス州では人間の歯と骨に染み込んだ形で発見されたことが宝石学史上で注目されました。
On this page
Jewelry Use
Durability
1/10
Science FYI Family
Frequently Asked Questions
What is Vivianite?
ビビアナイトは含水鉄リン酸塩鉱物で、採掘直後は無色から淡黄緑色ですが、光への暴露で急速に深い青から青緑、そして暗青‐黒色へと色変化する顕著な性質で知られます。この色変化は鉄の酸化によるもので、泥炭湿地・沼沢地堆積物・鉱床の酸化帯に産出します。ブラジルのミナスジェライス州では人間の歯と骨に染み込んだ形で発見されたことが宝石学史上で注目されました。
What is the hardness of Vivianite?
Vivianite has a Mohs hardness of 1.5 to 2.0, making it relatively soft for use in jewelry.
What color is Vivianite?
Vivianite is primarily Various.
How much does Vivianite cost?
Vivianite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Vivianite?
Vivianite belongs to the Monoclinic crystal system.