Pyrope

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Deep blood-red in color, pyrope is the member of the garnet group whose hue is produced by iron and chromium. It frequently occurs as perfectly rounded, water-worn crystals known as anthill garnets, so called because ants excavate them to the surface in Arizona. Pyrope forms in peridotites, kimberlites, and high-pressure metamorphic rocks, and is recovered from Bohemia in the Czech Republic, South Africa, Australia, and the American Southwest. Its rich red rivals that of ruby, and the stone has been set in jewelry since the Middle Ages, most famously in the Bohemian garnet pieces of the eighteenth and nineteenth centuries. With a Mohs hardness of 7 to 7.5 and good durability, pyrope is well suited to everyday wear.

Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 7,0 – 7,5

Specific Gravity 3,62 – 3,87

Refractive Index 1,72 – 1,756

Crystal System Isometric

Luster Vitreous

Cleavage Indistinct

Fracture Conchoidal

Color various

Dispersion 0,022

Pleochroism Absent

Mohs Hardness

Mohs hardness of Pyrope shown against the ten reference minerals, from talc (1) to diamond (10).

Mohs	Reference mineral	Pyrope
1	Talc
2	Gypsum
3	Calcite
4	Fluorite
5	Apatite
6	Orthoclase
7	Quartz	●
8	Topaz
9	Corundum
10	Diamond

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Pyrope

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 Pyrope

Piropo é uma variedade de granada de cor vermelho-vivo a vermelho-escuro profundo causada pelo magnésio e alumínio, geralmente com ausência de ferro. O nome deriva do grego para semelhante ao fogo. Os piropo de cor vermelho-sangue de Trebnice, na Boémia, foram muito populares na joalharia barroca europeia. Os piropo da região de Böhmen, na República Checa, são histórica e gemologicamente famosos. A variedade rodolite, com tons mais violáceos, é particularmente apreciada. O piropo ocorre em kimberlites e peridotitos, frequentemente como indicador de diamantes nas pesquisas geológicas.