Ruby

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Ruby is the red variety of corundum, colored by chromium, and stands among the four precious gemstones alongside diamond, emerald, and sapphire; the finest examples command higher per-carat prices than any other gem. The most prized stones, described by the trade as pigeon's blood red, come from the Mogok Valley of Myanmar, which has been mined for over 2,500 years, with additional fine material from Mozambique, Thailand, and Sri Lanka. A Mohs hardness of 9 and outstanding durability make ruby ideal for everyday jewelry. In many Asian cultures the stone symbolizes power, passion, and protection, and it serves as the birthstone for July.

Physical & Optical Properties

Category Precious Gems
Mohs Hardness 9.0
Specific Gravity 3.97 – 4.05
Refractive Index 1.762 – 1.778
Crystal System Trigonal
Cleavage None
Color red
Birefringence 0.008
Dispersion 0.018
Pleochroism Strong: purplish-red - orangy-red

Mohs Hardness

Mohs Hardness: 9.0
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Investment ($5,000+/ct)

Cultural Significance

Birthstone Month 7 (modern)

About Ruby

루비는 크롬에 의해 붉은색을 띠는 강옥의 일종으로, 다이아몬드·에메랄드·사파이어와 함께 4대 귀석에 속하며 최상품은 캐럿당 가격이 어떤 보석보다도 높습니다. 가장 진귀한 루비는 '비둘기 피' 붉은색으로 알려져 있으며, 미얀마 모곡 계곡에서 2,500년 이상 채굴되어 왔고 모잠비크·태국·스리랑카에서도 훌륭한 원석이 나옵니다. 많은 아시아 문화에서 루비는 권력, 열정, 수호의 상징입니다.

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Frequently Asked Questions

What is Ruby?
루비는 크롬에 의해 붉은색을 띠는 강옥의 일종으로, 다이아몬드·에메랄드·사파이어와 함께 4대 귀석에 속하며 최상품은 캐럿당 가격이 어떤 보석보다도 높습니다. 가장 진귀한 루비는 '비둘기 피' 붉은색으로 알려져 있으며, 미얀마 모곡 계곡에서 2,500년 이상 채굴되어 왔고 모잠비크·태국·스리랑카에서도 훌륭한 원석이 나옵니다. 많은 아시아 문화에서 루비는 권력, 열정, 수호의 상징입니다.
What is the hardness of Ruby?
Ruby has a Mohs hardness of 9.0, making it excellent for use in jewelry.
What color is Ruby?
Ruby is primarily Red.
Where is Ruby found?
Ruby is found in Jegdalek (Afghanistan), Mogok (Myanmar), Sri Lanka (Ceylon) (Sri Lanka), Ratnapura (Sri Lanka), Luc Yen (Vietnam).
How much does Ruby cost?
Ruby falls into the Investment ($5,000+/ct) price range. Prices vary based on color, clarity, cut, and origin.

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