Mineral Specimen and Product Inventory Search
- Availability
- Available
- Price
- $40.00
- Locality
- Gjerdingselva, Nordmarka, Lunner, Oppland, Norway
- Formula
- NaCaAlF6·H2O
- Size
- 3.5 x 3 x 2 cm - Miniature
Tiny colorless micro crystals in a vug unseen in the photos, but visible under the microscope. Pachnolite usually occurs in pegmatites with a fluorine component most notably but not limited to Ivigtut. Such pegmatites often contain fluorite, fluellite, prosopite, topaz, cryolite, ralstonite and other alkali aluminum fluoride granitic bodies which are peraluminous and usually in "NYF" (niobium-yttrium-fluoride) evolved and fractionated pegmatites. In this case Gjerdingselva is not a pematite but is alkali (soda) rich in flourine.
- Availability
- Sold
- Locality
- Wheal Cock, Botallack, St. Just, Cornwall, England
- Formula
- NaCa2(Mg4Al)(Si6Al2)O22(OH)2
- Size
- 10 x 7 x 6.5 cm - Cabinet
Tight bladed green Pargasite crystals to 5cm in mass.
- Availability
- Sold
- Locality
- Wagholi, near Pune, Maharashtra, India
- Formula
- CaV4+OSi4O10·4H2O
- Size
- 4 x 3.5 x 3.5 cm - Miniature
- Tagged
- vanadium
Prismatic Pentagonite crystals with sharp terminations. There are many excellent crystals. There may be Cavansite near the center of the cluster. The two minerals share the exact same composition but are dimorphous, although they both crystallize in the orthorhombic system. The symmetry is different between the two. Pentagonite is bladed, while Cavansite is more prismatic. Visually, Cavansite crystals show a more prismatic nature with complex terminations and chisel-like as opposed to bladed like Pentagonite. Get it? Anyhow the whoole cluster is 1.4cm.
- Availability
- Available
- Price
- $40.00
- Locality
- Capranica, near Viterbo, Lazio, Italy
- Formula
- CeAl2B4O10
- Size
- 5 x 2.5 x 2.5 cm - Miniature
- Tagged
- REE mineral
Tiny yellow micro crystal to about 0.75mm.
- Availability
- Sold
- Locality
- Big Chief mine, Pennington Co., South Dakota, United States
- Formula
- BaMn2+2Fe3+2(PO4)3(OH)3
- Size
- 2.5 x 1.5 x 0.8 cm - Thumbnail
- Tagged
- phosphate, pegmatite mineral
- Special Info
- Type Locality
Black grains of Perloffite. The larger grain show the embedded pointed crystals of Perloffite somewhat.
- Availability
- Available
- Price
- $1,750.00
- Notes
- Discounts/Promos do NOT apply to this item
- Featured
- Featured in Special Editions
- Locality
- Monteponi mine, Iglesias, Sardinia, Italy
- Formula
- Pb2CO3Cl2
- Size
- 3 x 3 x 1.5 cm - Thumbnail
- Tagged
- carbonate
- Special Info
- Fluorescent
This Phosgenite is a short prismatic complete crystal with a flat termination. The prism faces are mildly striated and the color is a light brown to colorless white. The luster is good. No damage. Mounted on acrylic.
Monteponi is the premier world locality as Pagano points out in his MR (v45 Nov/Dec) article. There is no other locality which exhibits the color, luster and crystal size like Sardinian Phosgenite. Yellow-orange fluorescence under longwave UV (as shown).
