Description
A superb group of lustrous black crystals of this very rare species, to 3.3 cm, perched on a granite matrix. A small reddish-brown Bastanite xl is nestled amidst the group. Although Riebeckite is a common black rock-forming mineral at the deposit, it is very uncommon as crystallized specimens. According to Dr. Peter Leaven's analysis (University of Delaware) "An analyzed grain is close to pure Riebeckite but has some K and Ca as well as NA, and minor MN and MG substituting for FE, as well as trace AL, probably substituting for Si." This specimen is pictured in an article on Zagi Mountain by Dr. Peter Leavens and Obodda, published in the "Rare Earths" issue of The Mineralogical Record, May-June 2004 (Volume 35, number 3): figure 25 on page 218. This specimen was in many Obodda exhibit cases over the years.
Details
Species
Rbk
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
—Origin
Riebeckite 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