The name opal was probably derived from Sanskrit "upala", meaning "valuable stone". Moss opal belongs to the category of "common opal", which is opaque, rarely translucent, and typically exhibits no play of color. Precious opals display rainbow-like hues that change with the angle of observation. Moss opal is a milky white opal with unique inclusions of green hornblende in moss-like patterns. They are also often traded under marketing names, such as 'dendritic opal' or 'tree agate'. Moss opals are mostly offered as opal cabochons and are best suited for earrings, brooches, and pendants. Other types of opals that are trade with matrix or host rock (e.g., boulder opal and opal in matrix) are more durable and are better suited for rings. Even though opals are quite fragile, they are still one of the world's most popular jewelry gemstones.
There is a long standing belief in the healing power of opal. It is reported to be able to relieve depression and to help its wearer find true love.
Gemselect is o.k the prices are pretty good, but the shipping prices really suck, one time I order from them and order got lost or never came, but they were good about fixing the problem and rectifying the situation, the stones and good, and the ones that come in the mail, look just as pictured on the website, or all it's not bad and its were I go to get my stones.
It was super easy to browse all the gemstones and find exactly what you wanted. The prices were great and the checkout process was smooth. Seems like a great site, will definitely come back to find more in the future.