Opal and tourmaline give October birthstones a full rainbow of colors to choose from.

The aforementioned Soleil Rainbow Sapphire Opal Connection necklace from Jia Jia, which the Florida socialite linked on her Instagram Story, is a whopping $500.

The 'Virgin Rainbow' is one of the world's rarest and most expensive opals. This extremely rare opal exhibits incredible fluorescence with a rainbow of different colors that make opal so ...

Opal has a vast spectrum of light and colour within its corundum, whereas tourmaline distributes and reflects its many different and dazzling hues amongst individual crystals. What does October ...

The opal stone's unique beauty makes it a great choice for the unconventional bride, or the couple looking for a less traditional engagement ring. Here, 45 stunning opal engagement rings.

ANTIQUES ROADSHOW expert John Benjamin left a guest stunned at the valuation of her opal necklace after revealing she had been scared to wear it.

The Virgin Rainbow isn't the most valuable opal in the world. That honour goes to a massive, 3.45-kilogram (7.6-pound) stone named the Olympic Australis opal, excavated in the Coober Pedy in 1956.

A rare multi-coloured gem widely believed to be the world’s finest opal - known as the Virgin Rainbow – is set to go on display for the first time at a museum in south Australia.