The sample at right is about 12x25 cm and is also from Ehime, Japan.
These samples of stibnite are displayed in the Smithsonian Museum of Natural History. Stibnite is a sulfide mineral of antimony. It has the composition Sb2S3(OH) or Sb2S3. The left sample is about 4x25 cm and is from Ichinokawa mine, Ehime, Japan.
Stibnite is mined as a source of antimony. The mines at Ehime were depleted in the 1890s.
The size of the left sample is about 15 cm wide. It is at the same scale as the sample above right. This sample is from Baia Sprie, Romania. Stibnite has been mined at Baia Sprie since the 1300s for the antimony.
This sample of stibnite is about 16 cm wide. It is from the Ichinokawa mine, Ehime, Japan.
This is an example of a twisted crystal of stibnite. It is from Ichinokawa mine, Ehime, Japan.
This is stibnite with barite. This sample is about 20 cm wide and is from Baia Sprie, Crisana-Maramures, Romania. "The black, toothpick-shaped stibnite crystals formed first, out of a water solution containing antimony and sulfur. Then the solution changed composition. Barite crystals grew on top, looking like a dusting of snow.