Two-sided sample of the rare beryllium silicate – tugtupite with the ability of so-called tenebrescence (changes color after being exposed to UV radiation). The grain size is 10 mm.
Two-sided sample of the rare beryllium silicate – tugtupite with the ability of so-called tenebrescence (changes color after being exposed to UV radiation). The grain size is 10 mm.
| Weight | 6 g |
|---|---|
| Dimensions | 13 × 18 × 33 mm |
