6 x 8 x 4 cm (W x H x D) agate top grain Origin: unknown, possibly Turkey or Brazil, from an old collection
10 x 15 x 5 cm (W x H x D) Location: South-East of Durango Mexico, North America
17 x 16 x 9 cm (W x H x D) Location: South-East of Durango Mexico, North America
17 x 16 x 7 cm (W x H x D) Location: South-East of Durango Mexico, North America