Natural Herkimer Diamond Quartz Crystal 5mm to 10mm Water Clear Undrilled - 10 Pcs Random Selection They are vary in size but range between 5mm to 10mm (varies),Random Selection. These are all natural and vary. Photos are representing items from lots. Colors can vary from lot to lot. Sizes can minimal vary too. Normally, It will took about 10-15 days delivery for United states,and 15-20 days for any other countries. For any reason, if you are not satisfied with our product, you may return your order within 14 days from the date of shipment received.