Obsidian:
![](http://images.google.co.uk/images?q=tbn:kbQMVsqVOFIJ:www.wicca.com/celtic/stones/images/obsidian-pol.jpg)
Gives reflection of one's flaws and promotion of clear picture of necessary changes; focusing one's inner vision; excellent
grounding stone; stabilizes internal and external energies; shields against negativity.
Snowflake Obsidian: used for calming, grounding, balancing, serenity, purity, guards against negativity, safe travel.
![](http://images.google.co.uk/images?q=tbn:IKJxfaEMTE4J:www.kobe-yamate.ac.jp/users/tetsuro/gemstones/images/obsidian.jpg)
Onyx:
![](http://images.google.co.uk/images?q=tbn:0K7T7-acHNIJ:www.kaleidoscopeiow.co.uk/Cabachons/onyx.jpg)
Used for concentration, devotion, hearing problems, heart trouble, healing ulcers.
A variety agate. The onyx is reputed to help concentration and devotion. Perhaps
it is for this reason that it is frequently to be found in rosaries. Helps hearing problems, heart trouble and ulcers.
Opal:
![](http://images.google.co.uk/images?q=tbn:IR7w7AA7NsgJ:www.aboutgemstones.com/gallery/opal.gif)
Opal is a scrying stone. It aids dreaming and lucid dreaming, astral projection, and metaphysical endeavour.