Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Tirodi mines, Madhya Pradesh, India
- Formula
- NaNa2(Mg4Fe3+)Si8O22(OH)2
- Size
- SmCabinet 6x4.5x3cm
The purple mineral was formerly known as "winchite", but was redescribed and now known as Magnesio-arfvedsonite.
- Availability
- Sold
- Locality
- Faraglione Ranni, Vulcano Island, Eolie Islands, Sicily, Italy
- Formula
- MgAl(SO4)2Cl·14H2O
- Size
- Thumbnail 1x0.8x.5cm
- Tagged
- Pickeringite
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Cotype
- Special Info
- Co-type material
Blue Magnesioaubertite with white pickeringite. Rare mineral and this is a co-type specimen.
- Availability
- Sold
- Locality
- Faraglione Ranni, Vulcano Island, Eolie Islands, Sicily, Italy
- Formula
- MgAl(SO4)2Cl·14H2O
- Size
- Thumbnail 3x3x2cm
- Special Info
- Type Locality
- Special Info
- Type Material
Light aqua-blue crystalline ball of Magnesioaubertite with white silky Pickeringerite. The specimen is from Georg Gebhard's collection and is part of the type specimen. See provenance tab.
- Availability
- Sold
- Locality
- Faraglione Ranni, Vulcano Island, Eolie Islands, Sicily, Italy
- Formula
- MgAl(SO4)2Cl·14H2O
- Size
- Miniature 5x3.5x2.5cm
- Special Info
- Type Locality
- Special Info
- Co-type material
A good sized specimen for co-type material. The mass is stark snow white and fibrous, soft and extremely light weight Pickeringite with light blue Magnesioaubertite. Extremely rare. See prov. tab.
- Availability
- Sold
- Locality
- Sludyanka, Lake Baikal area, Prebaikalia, Siberia, Russia
- Formula
- MgV2O4
- Size
- Thumbnail 1.5x1.5x1cm
- Tagged
- vanadium
- Special Info
- Type & Only Locality
Magnesiocoulsonite is a very rare vanadium spinel found only at this locality. This is a rich specimen of lime green Magnesiocoulsonite throughout marble matrix. Ex. Excalibur
- Availability
- Sold
- Locality
- Vesuvius, Naples, Campania, Italy
- Formula
- MgFe3+2O4
- Size
- Miniature 5x4.5x2cm
- Special Info
- Type Locality
A fabulous specimen of brilliant luster and modified octahedral crystals to 6mm. Many of the crystals display a cavernous growth habit. It is strongly magnetic with a black streak. The original labels called this Hematite, and it is definitely not. Vesuvius is the type locality for this member of the spinel group.
