In addition to the generic attributes of obsidian, Snowflake Obsidian has these additional properties:
"Placed on the sacral chakra Snowflake Obsidian calms and soothes, putting you in the right frame of mind to be receptive before bringing to your attention ingrained patterns of behavior. It teaches you to value mistakes as well as successes.
It is a stone of purity, providing balance for body, mind, and spirit. It helps you to recognize and release 'wrong thinking' and stressful mental patterns. It promotes dispassion and inner centering. With its aid, isolation and loneliness become empowering, aiding surrender in meditation.
Heatling: Snowflake Obsidian treats veins and the skeleton, and improves circulation."
(from The Crystal Bible by Judy Hall)
Hope this helps you,
GypsyDragonLady