Ivory
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Physical & Optical Properties
Category
Organic Gems
Mohs Hardness
2.0 – 3.0
Specific Gravity
1.7 – 2.0
Refractive Index
1.535 – 1.57
Crystal System
Amorphous
Cleavage
None
Color
various
Pleochroism
None
Mohs Hardness
Mohs Hardness: 2.0 – 3.0
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Ivory
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Treatments
Heated or dyed with tea to darken the color - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 7
Ivory has been imitated by many look-alike materials that include glass, plastic, bone and vegetable ivory. - Michael O�Donoghue, Gems, Sixth edition, 2006, p.665
2 to 3Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
1.70 to 2.00Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
NoneWalter Schumann, Gemstones of the world (2001)
1.535 to 1.570Walter Schumann, Gemstones of the world (2001) More from other references
NoneWalter Schumann, Gemstones of the world (2001)
NoneWalter Schumann, Gemstones of the world (2001)
NoneWalter Schumann, Gemstones of the world (2001)
White, creamyWalter Schumann, Gemstones of the world (2001) More from other references
Translucent,OpaqueWalter Schumann, Gemstones of the world (2001) More from other references
Most ivory: bluish white to violet blue (SW weaker)Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Violet-blueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
AmorphousHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Ivory information at mindat.org
About Ivory
상아(아이보리)는 코끼리, 하마, 바다코끼리 등의 엄니나 치아로 이루어진 유기 보석 소재입니다. 미세한 크로스해치 패턴(슈레거 선)을 보이는 코끼리 상아가 가장 잘 알려져 있습니다. 그러나 국제협약(CITES)에 의해 코끼리 상아의 거래는 엄격히 제한되며, 합법적으로 유통되는 상아는 화석 상아나 대체 소재를 사용합니다. 역사적·예술적 가치와 함께 윤리적 논란이 따르는 소재입니다.
Jewelry Use
Durability
1/10
Science FYI Family
Frequently Asked Questions
What is Ivory?
상아(아이보리)는 코끼리, 하마, 바다코끼리 등의 엄니나 치아로 이루어진 유기 보석 소재입니다. 미세한 크로스해치 패턴(슈레거 선)을 보이는 코끼리 상아가 가장 잘 알려져 있습니다. 그러나 국제협약(CITES)에 의해 코끼리 상아의 거래는 엄격히 제한되며, 합법적으로 유통되는 상아는 화석 상아나 대체 소재를 사용합니다. 역사적·예술적 가치와 함께 윤리적 논란이 따르는 소재입니다.
What is the hardness of Ivory?
Ivory has a Mohs hardness of 2.0 to 3.0, making it relatively soft for use in jewelry.
What color is Ivory?
Ivory is primarily Various.
How much does Ivory cost?
Ivory falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Ivory?
Ivory belongs to the Amorphous crystal system.