Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- NaCaMg3(AsO4)3
- Size
- Miniature 4x3.5x3cm
- Tagged
- arsenate
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Type & Only Locality
- Special Info
- Author's Material
A more detailed locality is: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. 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.
The mineral is a greenish to yellowish (polychromatic) to almost colorless well-shaped, terminated crystals (about 1 mm) combined in clusters / crusts on basalt scoria altered by fumarolic gas. Very rich.
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- NaCaMg3(AsO4)3
- Size
- Miniature 3.5x3.5x2cm
- 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, blue 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.
A more detailed locality is: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia.
- Availability
- Sold
- Locality
- Mt. Pyalkimpor, Lovozero Massif, Kola Peninsula, Russia
- Formula
- (Na,☐)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4
- Size
- Miniature 4x2.5x2cm
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Author's Material
Calciomurmanite is Na-Ca ordered analogue of murmanite. Murmanite does not contain calcium, only Na, by strict definition. Otherwise, you cannot tell these two minerals apart visually. Calciomurmanite crystals occur as thin plates and somewhat micaceous. The cleavage surfaces have a mother of pearl luster. This specimen was verified by Dr. Igor Pekov and was part of his study to define the mineral for publication. It is an approved IMA mineral, although not yet published.
- Availability
- Sold
- Locality
- Kambove dist., Katanga, Democratic Republic of Congo
- Formula
- CaCO3
- Size
- SmCabinet 6x5.5x2.5cm
- Tagged
- carbonate
Magenta rhombic crystals from 1-5mm. Brilliant color and beautiful specimen.
- Availability
- Sold
- Locality
- Shigar Valley, Baltistan, Northern Areas, Pakistan
- Formula
- CaCO3
- Size
- Cabinet 11x6x7cm
- Tagged
- carbonate
Calcite, especially this size, is rare in pegmatites. Most carbonates are associated with the primary phosphates. This specimen is an unusually large Calcite crystal perched nicely on Microcline. The specimen was photographed for figue 4-24 in London's "Pegmatites" book. See prov. tab for London't label.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Blackstone mine, Shullsburg, Lafayette Co., Wisconsin, United States
- Formula
- CaCO3
- Size
- Cabinet 9.5x5.5x2.5cm
- Tagged
- carbonate
An excellent specimen with good provenance. The specimen was personally collected by RJ Waidler in 1968 from underground at the Blackstone mine. The Calcite crystals are of rhombic forms with a cool frosted, faint yellow color. The crystals average about 8mm. The matrix is massive, crystalline dark reddish brown Sphalerite.
