Fine Mineral Specimens Over $50
- Availability
- Available
- Price
- $195.00
- Reduced Price
- $75.00
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- NaCaMg3(AsO4)3
- Size
- 6 x 4 x 3.5 cm - Sm Cabinet
- 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.
- Availability
- Available
- Price
- $95.00
- Locality
- Mt. Pyalkimpor, Lovozero Massif, Kola Peninsula, Russia
- Formula
- (Na,☐)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4
- Size
- 3.5 x 1.8 x 2 cm - Miniature
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
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
- Available
- Price
- $900.00
- Reduced Price
- $650.00
- Notes
- Discounts/Promos do NOT apply to this item
- Locality
- Merekski dist., Bureya Massif, Khabarovskiy Kray, Russia
- Formula
- SnO2
- Size
- 5 x 7 x 4 cm - Sm Cabinet
Absolutely superb well formed, dark brown Cassiterite crystals to over 2cm with a beautiful adamantine luster and a few smoky Quartz points to 1cm covering matrix. Excellent piece!
- Availability
- Sold
- Locality
- Morenci mine, Greenlee Co., Arizona, United States
- Formula
- Cu2S
- Size
- 13 x 6.5 x 8 cm - Cabinet
- Tagged
- ore mineral, sulfide, copper
Large mass of Chalcocite in porphyry matrix. The Chalcocite is massive, but is impressive with a beautiful luster.
- Availability
- Sold
- Locality
- Murunskii Massif, Chara & Tokko Rivers, Aldan Shield, Saha, Siberia, Russia
- Formula
- (K,Sr,Ba,Mn)15-16(Ca,Na)32Si70(O,OH)180(OH,F)4·nH2O
- Size
- 5 x 4.5 x 0.5 cm - Miniature
Sliced and Polished slab. Stunning purple color.
- Availability
- Available
- Price
- $255.00
- Locality
- Zorge, Bad Sachsa, Harz, Lower Saxony, Germany
- Formula
- PbSe
- Size
- 3.5 x 2 x 2 cm - Miniature
- Special Info
- Microprobed
There are two specimens: the mineral and the sliced and mounted specimen used for the identification of the mineral. The specimen is sliced in preparation for the microbrobe mount. It also carries and old inked label.
