Sternbergite
Sternbergite is a sulfide mineral with the chemical formula silver iron trisulfide (AgFe2S3). It belongs to the hexagonal crystal system and is classified under the Strunz system as 2.CB.65. This mineral exhibits a metallic luster and typically appears in a dark gray to black color. Sternbergite has a hardness of approximately 2.5 on the Mohs scale and a relatively high density. It is a rare mineral, primarily of interest to mineral collectors due to its unique composition and classification as a sulfide. Its properties and chemical structure place it in the sulfide mineral group.
Composition
- FeIron35.4%
- AgSilver34.2%
- SSulfur30.5%
Overview
Sternbergite is a sulfide mineral with the chemical formula silver iron trisulfide (AgFe2S3). It belongs to the hexagonal crystal system and is classified under the Strunz system as 2.CB.65. This mineral exhibits a metallic luster and typically appears in a dark gray to black color. Sternbergite has a hardness of approximately 2.5 on the Mohs scale and a relatively high density. It is a rare mineral, primarily of interest to mineral collectors due to its unique composition and classification as a sulfide. Its properties and chemical structure place it in the sulfide mineral group.
Etymology
Sternbergite is named after Kaspar Maria von Sternberg, a notable 18th-century mineralogist. The mineral was named in his honor to recognize his contributions to the field of mineralogy.
How to recognize it
Sternbergite can be identified by its metallic luster and dark gray to black color. It has a hardness of about 2.5 on the Mohs scale, making it relatively soft. The mineral has a high density, which can be a distinguishing feature. It does not have a distinct streak. Due to its rarity and softness, it is not commonly confused with other minerals, though its appearance may resemble other sulfides with similar luster and color.
Indicative prices
Sternbergite is a rare mineral and is seldom available in the gem or jewelry market. As a specimen, it can command indicative prices ranging from EUR 50 to EUR 200 or more, depending on origin, clarity, and size. It is not commonly cut as a gemstone, and prices for jewelry are not well documented. Market values vary by source and are highly dependent on specimen quality and rarity.