Here is a neat combo specimen from the old English collection of H.R. McBroom with its original card. Pyrite crystals covering a matrix composed of mainly siderite with clear/grey fluorite cubes and terminated quartz crystals scattered about the specimen. No specific mine is named but this specimen is from Weardale, N. Pennines, Co. Durham, England.
McBroom # 2731
Dimensions are 31.2 x 30 x 24.1 mm and weighs 20.3 grams.
25.4 mm = 1 inch / 10 mm = 1 cm
5 ct. = 1 gram / 28.35 grams = 1 ounce
All measurements are taken at the widest dimensions. Please review the size reference picture, all other pictures and listing information before completing your purchase and feel free to ask any further questions you'd like as all sales are final. Any stands or holders pictured are not included unless otherwise noted in the item's description.