Herderite

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Physical & Optical Properties

Mohs Hardness 5,0 – 5,5
Specific Gravity 2,9 – 3,02
Refractive Index 1,587 – 1,642
Crystal System Monoclinic
Luster Vitreous
Cleavage Indistinct
Fracture Sub-Conchoidal
Color various
Birefringence 0,028

Mohs Hardness

Mohs Hardness: 5,0 – 5,5
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

About Herderite

La herderita es un raro fluorfosfato de calcio y berilio que forma cristales prismáticos o en barril de color incoloro, amarillo pálido, verde pálido o violáceo en pegmatitas de berilio. Los más finos especímenes transparentes de calidad gemológica provienen de Brasil y Maine; los cristales de mayor tamaño de Myanmar también han producido gemas facetadas de coleccionista. Su rareza y excelente brillo la hacen muy apreciada por los coleccionistas de gemas de fosfato.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Herderite?
La herderita es un raro fluorfosfato de calcio y berilio que forma cristales prismáticos o en barril de color incoloro, amarillo pálido, verde pálido o violáceo en pegmatitas de berilio. Los más finos especímenes transparentes de calidad gemológica provienen de Brasil y Maine; los cristales de mayor
What is the hardness of Herderite?
Herderite has a Mohs hardness of 5.0 to 5.5, making it moderate for use in jewelry.
What color is Herderite?
Herderite is primarily Various.
How much does Herderite cost?
Herderite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Herderite?
Herderite belongs to the Monoclinic crystal system.

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