Obsidian Arrowhead

Protection, aggressive magic. Reflecting dislike and malice back to the perpetrator.

Okenite

Helps uncover unconscious thoughts and allows one to see the truth of a situation. Facilitates psychic visions and channelling.

http://www.spiritofisis.org/knowledge/crystal_files/okenite.htm

Onyx

Onyx is an excellent stone for releasing negative emotions such as sorrow and grief, and therefore brings good fortune and helps in recognizing personal strength.

http://www.sunnyray.org/Crystals-O.htm

Orange Aventurine

Enhancing creativity, supplements motivation in activities, and augments the 'pioneering' spirit. Reinforces decisiveness and amplifies leadership qualities. 
http://www.therockcrystalshop.com.au/crystal-metaphysical-healing-properties/aventurine-green-aventurine-red-peach-blue-orange-pink-white-yellow

Orange Calcite

Protection,enhances sexual energies and creative abilities. 

http://www.forthejoyofit.com/Joy2_Sexuality/Joy2_Orange_Calcite.htm

Peacock Ore

This stone of happiness and joy will help you tune into positive forces in life and channel that energy to others.  It brings you the ability to see and accept the joy in any moment.


http://www.crystalsrocksandgems.com/Healing_Crystals/PeacockOre.html

Peridot

Guards against enchantments, night terrors, psychic attack. Used to attract love, to calm raging anger, soothes nervousness, dispels negative emotions, promotes sound sleep, relieves depression.
http://fullmoon-crystals.150m.com/magic.html

Petrified Wood

Gives awareness of nature, grounding. Used in spells to give long life, to recall past lives. Used as an amulet deflects negativity, protects against drowning, protective.

http://fullmoon-crystals.150m.com/magic.html

Pink Agate

Love.  It soothes anger and negative energy


http://www.peacefulmind.com/stones.htm

Prase

Resolves sexuality issues; sense of oneness with universe; Earth-mother stone.

http://www.dreamtime.bz/metaphysical_properties.html

Purple Flourite

Aids the ability to meditate, increases psychic development and brings spiritual peace and wholeness.

http://lifestreasureskauai.com/blog/crystals/fluorite-the-ultimate-multi-tasking-gemstone/

Quartz

All purpose, cleansing, power restorative.