Search Archived Mineral Specimens
- 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
- 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
- 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
- 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.
- Availability
- Sold
- Locality
- Bear Hole mine, Shullsburg, Lafayette Co., Wisconsin, United States
- Formula
- CaCO3
- Size
- SmCabinet 6x5x8cm
- Tagged
- carbonate
A large slightly yellow nailhead crystal of Calcite with good striations and cleaved at the base. Collected in 1970 by Waidler.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Elmo mine, Lafayette Co., Wisconsin, United States
- Formula
- CaCO3
- Size
- SmCabinet 9x4.5x2cm
- Tagged
- carbonate
A fine specimen which shows much better in-hand than on the screen. Calcite crowns to top of this specimen with 5-8mm colorless crystals. The back side is covered with the same. The matrix is of large framboidal, brassy colored Marcasite crystals. It's a very nice specimen with an accurate locality - the Elmo mine, which was personally collected by RJ Waidler in 1970.
