Pink Opal is a common Opal, a hydrated silica material. It has a hardness of 5.5 - 6.5 and is generally opaque and it does not display any "fire" that can be seen in precious Opal.
Pink Opal is known as a stone of renewal. It has a lower vibrating frequency and a more gentle intensity than transparent and fiery Opals, which actually enhances it's soothing and calming effects on the emotional body. It is said to bring love, peace and tranquility into one's aura, as well as encourage hope, acceptance, trust and compassion.