Cacholong - Opal Variety
Item number: MIN0718
Price: EUR 92.00
(incl. sales tax 19%).Gross price is indicated for recipient country = Germany. Net EUR 77.31. Amount of sales tax depends on delivery address (EU sales tax reform as of July 1, 2021). Country setting can be changed in the shopping cart.
Unique nodule of white opal, so-called Casholong with corrosive polygonal surface sculpturing. Deep cracks on the surface arise in the final phase of the formation of an opal concretion in the environment of a volcanic (rhyolite) eruption as a result of internal stress and subsequent corrosion (alteration) processes. This creates a characteristic geometric arrangement with a typical polygonal structure.
| Format | 35 (the sample fits or fills up the box of 55x51x25 mm. Sample might be little higher) |
|---|---|
| Size | 50x40x38 mm |
| Weight | 87 g. |
| Locality | Naseriani, Mtowabaga, Lake Natron, Northern Tanzania |