Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Great Slave Lake, Northwest Territories, Canada
- Formula
- NiAs2
- Size
- Cabinet 10x9x5cm
- Tagged
- ore specimen , nickel
Large, impressive ore specimen of nearly all Rammelsbergite, an ore of nickel
- Availability
- Sold
- Locality
- Mumba, Osso, Masisi, North Kivu, DR Congo
- Formula
- (Na,K,Pb)(Ta,Nb,Al)4(O,OH)10
- Size
- Thumbnail 1.5x1.5x1cm
- Tagged
- pegmatite mineral , tantalum
- Special Info
- Type Locality
Rankamaite is a five-locality mineral and is confined to pegmatites, however, at this locality, the mineral is found in what they call the Mumba casiterite gravels. No doubt these gravels originated in a pegmatite.
In this specimen the Rankamaite is the pearly white, fibrous crystals. The Simpsonite is the slightly translucent orange crystal grains.
- Availability
- Sold
- Locality
- Kobokobo Pegmatite, Sud-Kivu, Democratic Republic of Congo
- Formula
- Al(UO2)(PO3OH)(OH)3·4H2O
- Size
- Thumbnail 2.8x1.6x0.9cm
- Tagged
- phosphate
- Special Info
- Radioactive!!
- Special Info
- Type Locality
Glassy yellow-orange plates covering much of matrix. Excellent piece of the extremely rare mineral.
- Availability
- Sold
- Locality
- Kobokobo Pegmatite, Sud-Kivu, Democratic Republic of Congo
- Formula
- Al(UO2)(PO3OH)(OH)3·4H2O
- Size
- Miniature 5x4x3cm
- Tagged
- phosphate
- Special Info
- Fluorescent
- Special Info
- Radioactive!!
Bright yellow beady looking crystals of extremely rare Ranunculite. The entire mass is fluorescent green so I am assuming much more here than meets the eye.
- Availability
- Sold
- Locality
- Kobokobo Pegmatite, Sud-Kivu, Democratic Republic of Congo
- Formula
- Al(UO2)(PO3OH)(OH)3·4H2O
- Size
- SmCabinet 7x5.5x5.5cm
- Tagged
- phosphate , pegmatite mineral
- Special Info
- Type Locality
An earthy mass full of secondary uranium alterations. If I have this right, and I have never seen this mineral before, the bright yellow coatings are Triangulite, which is the prevalent mineral. The light yellow crystals are the Ranunculite. However, looking at the list of minerals there are a plethora of other minerals found at this deposit including the very rare Eylettersite. This deposit features 14 type locality minerals any of which could be found on this specimen. It is a large specimen, so breaking it up analyzing it would be good thing to do. The long bladed thin crystals are columbite and even these seem to be altered. There are also brown zircon "cyrtolite". A handwritten label can be seen under the prov. tab.
- Availability
- Sold
- Locality
- Rapid Creek, Yukon Territory, Canada
- Formula
- Ca2(SO4)(CO3)·4H2O
- Size
- SmCabinet 5.5x4x2cm
- Tagged
- carbonate
- Special Info
- Type Locality
Of the nine known localities on planet Earth, Rapid Creek is the best. This specimen contains a good amount of Rapidcreekite as radial groups of snow white acicular crystals to 3mm. Very nice specimen.
