Gemstones with unusual formations inside or outside them are always preferred by customers as well as sellers because they have the power to attract the attention of people. The link above shows
us a strangely beautiful triangular opal that looks like it is a gemstone embedded inside a tree trunk. The opalescent hues of aqua blue and emerald green look as though they are visible from behind
what seems to be the rings of a tree trunk. It is unclear as to what caused these woody formations, this stone reportedly originated in Australia. It was sold at a high price.