• Color: Dark Red

• Clarity: Eye Clean

• Origin: Morocco

• Cut: Rectangular Step

• Treatments: None

• Measurements: 8.1 x 5.7 mm

One of the great gem rarities, faceted Proustite is almost unheard of outside of institutional collections. A silver sulfantimonide mineral, Proustite is well known for the stunning deep red color of crystals, along with its importance as a silver ore. As such, it is sometimes even referred to as 'ruby silver'. As a gem, it is quite a unique material - the color in many crystals can darken upon exposure to light so that the red can be difficult to see once the stone has been faceted. This makes for a stone that has an intense color but also a metallic luster - an extreme version of the visual effect of Cuprite. This example retains an excellent red bodycolor and is a simply amazing gem for both is quality and outstanding size. A precision cut and great polish for this difficult material and simply one of the best colors we have ever seen for Proustite.

$650 / carat - $1930 total