Demantoid
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First discovered in Russia's Ural Mountains in 1853, demantoid is the green variety of andradite garnet, and it carries higher dispersion than any other natural gemstone, diamond included, producing fiery spectral flashes even in subdued light. Russian material, identifiable by fibrous horsetail chrysotile inclusions, remains the most prized, while Namibia and Italy add further supply. It crystallizes in the isometric system and measures 6.5 on the Mohs scale, softer than many garnets but exceptional in brilliance. Moderately priced among the semi-precious gems, demantoid is regarded by many collectors as the most magnificent of all garnets.
Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5
Specific Gravity
3.77 – 3.95
Refractive Index
1.88 – 1.89
Crystal System
Isometric
Color
various
Mohs Hardness
Mohs Hardness: 6.5
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Moderate ($50-500/ct)
Where to Buy Demantoid
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 Demantoid
데만토이드는 녹색 안드라다이트 가넷의 품종으로, 보석 세계에서 가장 강한 분산도를 지닌 녹색 보석 중 하나입니다. 다이아몬드보다 높은 분산도로 인해 불꽃 같은 광채를 발하며, 천연 말꼬리 인클루전(horsetail inclusion)이 진품 감별의 기준이 됩니다. 러시아 우랄 산맥이 전통 산지이며 최상급품은 매우 희귀합니다.
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Demantoid?
데만토이드는 녹색 안드라다이트 가넷의 품종으로, 보석 세계에서 가장 강한 분산도를 지닌 녹색 보석 중 하나입니다. 다이아몬드보다 높은 분산도로 인해 불꽃 같은 광채를 발하며, 천연 말꼬리 인클루전(horsetail inclusion)이 진품 감별의 기준이 됩니다. 러시아 우랄 산맥이 전통 산지이며 최상급품은 매우 희귀합니다.
What is the hardness of Demantoid?
Demantoid has a Mohs hardness of 6.5, making it moderate for use in jewelry.
What color is Demantoid?
Demantoid is primarily Various.
How much does Demantoid cost?
Demantoid falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Demantoid?
Demantoid belongs to the Isometric crystal system.