Bournonite: Yaogangxian Mine, Chenzhou, Hunan Province, China.(Connoisseur's Choice)

Rocks & Minerals | January 1, 2005| | Copyright

There are certain mineral species that collectors either consciously or subconsciously use as a measure of the quality and sophistication of whatever collection they are viewing. The number, size, and perfection of flashy minerals such as wulfenite, rhodochrosite, and azurite coupled with their localities can be used to gauge dollars spent and perhaps the age of the collection. However, there are other minerals that in fine specimens, although periodically available at some typically elevated price, elude most collectors and yet can be the very hallmark by which a collection ...

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