Selenite from Castrillo del Val, Spain
Magnificent specimens of Gypsum var Selenite from Castrillo del Val.
£20.00 – £25.00
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Selenite from Castrillo del Val, Castrillo del Val, Provincia de Burgos, Castilla y León, Spain
Magnificent specimens of Gypsum var Selenite from Castrillo del Val. The seller I bought these from referred to them as arrowheads and I definitely agree.
They're quite opaque and included as selenite goes, but lets be honest, the shape is the thing here. This is a result of a phenomenon called twinning, where a crystal grows with its atoms oriented differently in one half than the other - I believe the technical term for these specimens is 'swallowtail twinning', but it might also be referred to as fishtail twinning.
Additional information
| Weight | 0.05 kg |
|---|---|
| Dimensions | 8 × 8 × 5 cm |
| Specimen | #1 – 76.6×51.2×17.2MM, #2 – 80.1×43.2x17MM, #3 – 66×40.4×6.8MM |
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