Stones that are useful during Ostara are: 
Agate, Aquamarine, Bloodstone, Clear and Rose Quartz, Moonstone, Lapis Lazuli, Amethyst, and Red Jasper.

*Some of this information was taken from Llewellyn’s Sabbat Essentials Ostara and Llewellyn’s complete book of correspondences by Sandra Kynes*

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