Labradorite
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Famed for a vivid iridescence known as labradorescence, labradorite is a calcium-rich plagioclase feldspar whose flashes of blue, gold, green, orange, and red arise from light interference between fine twinning layers inside the stone. It was first found in 1770 on Canada's Labrador Peninsula, the source of its name; major gem material now comes from Madagascar, Finland, and Mexico, and the Finnish variety spectrolite shows especially dramatic full-spectrum color. Crystallizing in the triclinic system, it measures 6.0 to 6.5 on the Mohs scale. Moderately priced and semi-precious, labradorite is one of the most widely used stones in modern jewelry and lapidary work.
Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.0 – 6.5
Specific Gravity
2.69 – 2.72
Refractive Index
1.554 – 1.573
Crystal System
Triclinic
Luster
Vitreous
Cleavage
Perfect
Fracture
Uneven
Color
various
Birefringence
0.007
Pleochroism
From the Congo, red stones show weak pleochroism whilst greenstones have distinct greenish yellow to bluish green pleochroism
Mohs Hardness
| Mohs | Reference mineral | Labradorite |
|---|---|---|
| 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 Labradorite
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 Labradorite
拉长石是长石族中以独特的'拉长彩'（游彩效应）著称的矿物，在不同角度下可见蓝色、绿色、金色、橙色甚至红色等丰富的色彩流光，色彩变幻如极光般绚丽。这种效应源于矿物内部细薄的层状结构对光的衍射。具有极强游彩的品种被称为'光谱石'，颜色几乎覆盖整个彩虹光谱。拉长石主要产于芬兰、加拿大、马达加斯加和挪威等地，是珠宝装饰中深受欢迎的宝石材料。
On this page
Jewelry Use
Durability
5/10
Science FYI Family
Frequently Asked Questions
What is Labradorite?
拉长石是长石族中以独特的'拉长彩'（游彩效应）著称的矿物，在不同角度下可见蓝色、绿色、金色、橙色甚至红色等丰富的色彩流光，色彩变幻如极光般绚丽。这种效应源于矿物内部细薄的层状结构对光的衍射。具有极强游彩的品种被称为'光谱石'，颜色几乎覆盖整个彩虹光谱。拉长石主要产于芬兰、加拿大、马达加斯加和挪威等地，是珠宝装饰中深受欢迎的宝石材料。
What is the hardness of Labradorite?
Labradorite has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Labradorite?
Labradorite is primarily Various.
How much does Labradorite cost?
Labradorite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Labradorite?
Labradorite belongs to the Triclinic crystal system.