Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Pohndorf mine, Boulder Batholith, Jefferson Co., Montana, United States
- Formula
- SiO2
- Size
- Miniature 3.5x2.5x2.5cm
Excellent specimen with multiple amethyst crystals in parallel growth and all terminated.
- Availability
- Sold
- Locality
- Tadpole pegmatite, Toll Mtn area, Jefferson Co., Montana, United States
- Formula
- SiO2
- Size
- Miniature 4x2x1cm
Excellent specimen of light smoky Quartz with a darker phantom in both crystals. There are two parallel smokies, the largest is to 3cm. It is very lustrous.
- Availability
- Sold
- Locality
- Tadpole pegmatite, Toll Mtn area, Jefferson Co., Montana, United States
- Formula
- SiO2
- Size
- Miniature 3.2x2.3x1cm
This is a flat, tabular specimen, very lustrous with cool darker phantom at the center.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Oreamnos Lake, Sawtooth Batholith, Boise Co., Idaho, United States
- Formula
- SiO2
- Size
- SmCabinet 8x5x4cm
- Tagged
- pegmatite mineral
The Sawtooth Batholith is a shallowly emplaced granite pluton dating to Eocene(45Ma). Miarolitic cavities contain pegmatites containing smoky Quartz, Orthoclase, Albite, and Zinnwaldite. This is an excellent example of these pegmatites, which exhibit the transition from equigranular granite to pegmatite. The photos show how small, 1-3mm, granite grains with graphitic growth phases into larger crystals grown towards the center of the cavity.
The smoky Quartz crystals are 5-12mm and look to be paragenetically first to crystallize. Second to crystallize were the pink Microcline & Topaz crystals and last are the Zinnwaldite. The Topaz are waterclear and are about 4mm.
- Availability
- Sold
- Locality
- Basin Creek, Jefferson Co., Montana, United States
- Formula
- SiO2
- Size
- Miniature 3.5x2x1.5cm
A very nice dark amethyst crystal with scepter growth. Looking closely at this specimen you will see Rutile and Hematite inclusions throughout the crystal. It's a very nice specimen terminated at both ends and cool stepped growth features.
- Availability
- Sold
- Locality
- Crystal Park, Beaverhead Co., Montana, United States
- Formula
- SiO2
- Size
- Thumbnail 2.2x1x1cm
A crystal clear light amethyst scepter. Excellent!
