As with many top-quality colored stones, exceptional opals might not be cut to standard sizes and shapes. Cutters usually fashion exceptional rubies or sapphires, for example, in a way that saves ...

while other stones like opals come in at around 6, making them more fragile. The cut of the stone is based on the general shape and size of the gem in its rough form. Master cutters analyze these ...

And why is it so expensive? Black opal is one of the most enchanting stones in the world, sought after for its seemingly infinite display of colors. Compared to common opal, which is usually one ...

When the holy water accidentally splashes her opal hair clasp, the stone fades to black, leaving it as “colourless as a common pebble.” Lady Hermione collapses in pain and is reduced to ...

We cut the sample in half for further examination. High magnification clearly showed the boundary between the orange layer and the substrate, which was also orange opal. The coated layer was about ...

looking for opals around the mouth of an opal mine (noodling)I found an aboriginal stone cutting implement made from petrified wood. The implement,4 x 2cm, has clearly marked brown and auburn wood ...