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- Availability
- Sold
- Locality
- Franklin, Sussex Co., New Jersey, United States
- Formula
- Ca3Al2(SiO4)3
- Size
- SmCabinet 6x6x2.5cm
This specimen is what was called caswellite in old literature, but has since been redescribed as mostly Grossular garnet replacing either hendricksonite or phlogopite mica. Analytical results are somewhat open to interpretation according to Dunn and has shown the replacement may also be to varying degrees Vesuvianite, chlorite and "other phases" perhaps Andradite. It is fascinating to note that the relict mica cleavages are shown perfectly.
- Availability
- Sold
- Locality
- Franklin, Sussex Co., New Jersey, United States
- Formula
- Ca3Al2(SiO4)3
- Size
- SmCabinet 9x6x8cm
This is the weird platy variety of Grossular they called "caswellite" originally. Apparently this is actually a pseudomorph after muscovite. The dark red coarse crystalline material is Andradite.
- Availability
- Sold
- Locality
- Sierra de Cruces, Coahuila, Mexico
- Formula
- Ca3Al2(SiO4)3
- Size
- Thumbnail 2.3x2.1x1cm
Bright red nicely formed crystals of Grossular garnet from this famous locality. These crystals have good luster and sharpness to them, unlike a lot of the competition. Excellent thumbnail.