Dendritic Yellow Opal Tumbles #1 measure approximately 13/16" to 1 5/16" (20mm to 35mm) and weigh approximately .18 to .40 ounces (4.5 to 10.4 grams). Please let me pick one for you. These are $2.00 USD each.
(Healing Crystal, Works on the Cleansing System of the Body)
Hardness: 5.5 - 6.5
Origin: Tanzania