Bidspirit auction | Natural History - Agate Crystal

Natural History - Agate Crystal Geode Cut Section Collection [3]. - Comprising three examples in enhanced blue colour, two showing an internal cavity filled with small quartz crystals. 962 grams total, 7.1-11 cm (2 3/4 - 4 3/8 in.). Ex Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [3, No Reserve]