Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Mogul of Prince Albert mine, Cripple Creek, Teller Co., Colorado, United States
- Formula
- AuTe2
- Size
- SmCabinet 7x5.5x5cm
- Tagged
- tellurium , gold
- Special Info
- Raman
Superb crystals of prismatic Calaverite to 2mm in vugs. Choice specimen with several crystals, minor tiny Gold specks, and perhaps also some Sylvanite as silvery crystals throughout monzonite matrix.
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- KCaCu5(AsO4)4[As(OH)2O2]·2H2O
- Size
- Thumbnail 0.7x0.6x0.4cm
- Tagged
- arsenate , copper
- Special Info
- Type Locality
Deep blue crystalline areas. This is small, less than 1cm, chip out of Dr. Georg Gebhard's collection. Tennantite matrix with other secondaries unidentified. Extremely rare mineral occuring in three worldwide localities. Tsumeb is the Type Locality.
A small, less than 7mm chip!
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- KCaCu5(AsO4)4[As(OH)2O2]·2H2O
- Size
- Chip xxcm
- Tagged
- arsenate , copper
- Special Info
- Type Locality
Deep blue crystalline areas. There will be another larger more expensive specimen on an upcoming Tsumeb Special Edition. This is small, less than 1cm, chip out of Dr. Georg Gebhard's collection. Tennantite matrix with other secondaries unidentified.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- KCaCu5(AsO4)4[As(OH)2O2]·2H2O
- Size
- Thumbnail 2x1.3x1cm
- Tagged
- arsenate , copper
- Special Info
- Type Locality
Deep blue crystalline areas. This is small, less than 2cm, chip out of Dr. Georg Gebhard's collection. Tennantite matrix with other secondaries unidentified. Extremely rare mineral occuring in three worldwide localities. Tsumeb is the Type Locality.
- Availability
- Sold
- Locality
- Rocabruna mines, Bruguers, Barcelona, Catalonia, Spain
- Formula
- Ca4MgFe3+4(PO4)6(OH)4·12H2O
- Size
- SmCabinet 5.5x3.5x2cm
- Tagged
- phosphate
Green crusts of Calcioferrite.
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- NaCaMg3(AsO4)3
- Size
- SmCabinet 6x4x3.5cm
- Tagged
- arsenate
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Type & Only Locality
- Special Info
- Author's Material
Calciojohillerite is a greenish to yellowish to almost colorless well-shaped, terminated crystals (about 1 mm) combined in clusters / crusts on basalt scoria altered by fumarolic gas. The specimen is very rich. It is one of the few study specimens from Igor Pekov's collection used to characterize the new mineral. It is not yet published but was approved in 2016.
A more detailed locality is: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia.
