Green Diopside Crystal #18 measure approximately 15/16" to 1 9/16" and weighs 9.0 to 23.0 grams. These look like they have Quartz in them, too, although I suppose it could be Calcite. These are very nice energy.
(Healing Crysta)
Hardness: 5.5 - 6.5
Origin: Brasil
Diopside stimulates the brain and even helps you in your studies. It also brings in your practical side to help you learn. This crystal can be useful for some mental illness, too. This crystal helps people who run, even runners who race against others, providing the winning edge. Diopside can help to straighten out misunderstandings you have with another person. This crystal is very calming for pets.