Imperial Topaz (A variety of topaz of orange, pinkish colours.)

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Physical & Optical Properties

Mohs Hardness 8.0
Specific Gravity 3.49 – 3.57
Refractive Index 1.609 – 1.643
Crystal System Orthorhombic
Cleavage Perfect
Fracture Uneven,Conchoidal
Color yellow
Birefringence 0.008
Dispersion 0.014
Pleochroism Yellow: definite - lemon-honey, straw-yellow; Red: strong - dark red, yellow, pink-red

Mohs Hardness

Mohs Hardness: 8.0
1 Soft10 Hard

Crystal System

a b c Orthorhombic a ≠ b ≠ c, α = β = γ = 90°

Value & Market

Price Tier Fine ($500-5,000/ct)

Where to Buy Imperial Topaz (A variety of topaz of orange, pinkish colours.)

About Imperial Topaz (A variety of topaz of orange, pinkish colours.)

Imperial topaz is the most prized variety of topaz, displaying a rich orange body color with pink to reddish-orange overtones derived from the presence of chromium, and distinguished by its exceptional brilliance and high refractive index. The finest material originates almost exclusively from the Ouro Preto region of Minas Gerais, Brazil, where it was historically mined and reserved for Russian royalty, giving rise to its imperial designation. Genuine imperial topaz commands significant premium prices in fine jewelry and collector markets due to its limited geographic origin and distinctive warm color.

Jewelry Use

Durability 9/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Imperial Topaz (A variety of topaz of orange, pinkish colours.)?
Imperial topaz is the most prized variety of topaz, displaying a rich orange body color with pink to reddish-orange overtones derived from the presence of chromium, and distinguished by its exceptional brilliance and high refractive index. The finest material originates almost exclusively from the O
What is the hardness of Imperial Topaz (A variety of topaz of orange, pinkish colours.)?
Imperial Topaz (A variety of topaz of orange, pinkish colours.) has a Mohs hardness of 8.0, making it excellent for use in jewelry.
What color is Imperial Topaz (A variety of topaz of orange, pinkish colours.)?
Imperial Topaz (A variety of topaz of orange, pinkish colours.) is primarily Yellow.
How much does Imperial Topaz (A variety of topaz of orange, pinkish colours.) cost?
Imperial Topaz (A variety of topaz of orange, pinkish colours.) falls into the Fine ($500-5,000/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Imperial Topaz (A variety of topaz of orange, pinkish colours.)?
Imperial Topaz (A variety of topaz of orange, pinkish colours.) belongs to the Orthorhombic crystal system.

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