Ludlamite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
3.0 – 4.0
Specific Gravity
3.1 – 3.2
Refractive Index
1.653 – 1.693
Crystal System
Monoclinic
Luster
Vitreous
Cleavage
Perfect
Fracture
Uneven
Color
various
Birefringence
0.04
Pleochroism
Nil
Mohs Hardness
| Mohs | Reference mineral | Ludlamite |
|---|---|---|
| 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 Ludlamite
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 Ludlamite
鲁德拉矿是一种水合磷酸铁矿物，以其鲜艳的翠绿色调著称，这种颜色在磷酸盐矿物中十分罕见。其晶体通常呈板状或片状，玻璃光泽明显，透明度较好。鲁德拉矿产于富铁磷酸盐矿床的氧化带中，在玻利维亚、法国等地均有发现。由于硬度较低（莫氏3.5）且易受风化，宝石级切割标本极为罕见，主要作为矿物标本受到藏家追捧。其亮丽的绿色使其在磷酸盐矿物中独树一帜。
On this page
Jewelry Use
Durability
2/10
Science FYI Family
Frequently Asked Questions
What is Ludlamite?
鲁德拉矿是一种水合磷酸铁矿物，以其鲜艳的翠绿色调著称，这种颜色在磷酸盐矿物中十分罕见。其晶体通常呈板状或片状，玻璃光泽明显，透明度较好。鲁德拉矿产于富铁磷酸盐矿床的氧化带中，在玻利维亚、法国等地均有发现。由于硬度较低（莫氏3.5）且易受风化，宝石级切割标本极为罕见，主要作为矿物标本受到藏家追捧。其亮丽的绿色使其在磷酸盐矿物中独树一帜。
What is the hardness of Ludlamite?
Ludlamite has a Mohs hardness of 3.0 to 4.0, making it relatively soft for use in jewelry.
What color is Ludlamite?
Ludlamite is primarily Various.
How much does Ludlamite cost?
Ludlamite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Ludlamite?
Ludlamite belongs to the Monoclinic crystal system.