Description
Stillwellite is a rare REE borosilicate and some of the best crystals of the species originate from the rugged mountains of Tajikistan. This is one of the better crystals collected from a remarkable pocket in September of 2004. It features a huge 2cm, translucent medium brown-yellow (normal indoor lighting) crystal on alkaline pegmatite matrix. Interestingly, they COLOR CHANGE from red in halogen or sunlight to YELLOW in fluorescent light. This is a superb, nearly complete crystal for the species, as well as being unusually attractive for the mineral. An old The Arkenstone label accompanies the piece from Rob's days in California while going to grad school. He bought this from the Fersman Museum in the mid 1990s; the museum label is still included with the piece. It is exceptional for the species. From an old find not repeated since.
Details
ColorsBrown, Yellow
Origin
Darai-Piez Massif, Alai Range, Tien-Shan Mountains, Tajikistan
SizeMiniature
Dimensions5.0 x 4.7 x 4.7 cm
Species
Known provenanceKnowing where your specimen comes from and who owned it adds to its story and value. Good provenance helps prove it's authentic and preserves important details about its discovery.
DateOwnerPriceNote
2024/08Unknown
Not disclosed
—UnknownThe Arkenstone
Not disclosed
—Stillwellite Sales Data
How this data is collected: Our system continuously monitors mineral listings from authorized dealer partners across the internet. We have explicit permission from all dealers whose listings we track - any dealers who have not provided specific and explicit authorization are NOT listed and NOT tracked by our system. When a previously available listing is marked as sold or removed from sale, we record this as a completed transaction. While we cannot guarantee the exact final sale price (as negotiations may occur), this data represents publicly listed prices for specimens that have transitioned from "for sale" to "sold" status. This provides valuable market insights based on observable listing behavior patterns.
💡 Tip: Click on chart columns to view sold specimens in each price range!
💡 Tip: Click on chart columns to view sold specimens in each price range!
Disclaimer: EarthWonders.com presents historical specimen sales data based on publicly available listings. This information is provided solely for educational and reference purposes. We do not offer investment advice, valuation guarantees, or financial recommendations. Collectors should independently evaluate any purchase decision based on their own research and collecting interests. Past sale prices do not predict future market behavior.
Total Items Sold: 0Total Value: $0
From
To
Loading sales data...
Specimen PreviewClick on a chart column to view sold specimens in that price range