opal

Should work with a standard 6mm x 8mm prong-type mounting.

This is a very nice stone with good fire. Remember, opal is very light and so are marquise cut stones in general. This is a big stone.

This is a very nice stone with good fire…much better than the picture shows.

This is an interesting stone that shows lots of rainbow colors in bright sunlight. Cut with a standard round brilliant pavilion and a Portuguese…

This stone is MUCH prettier in person. I just couldn’t get a good photo of the fire, and there is quite a bit up in the top of the dome. This stone…

This is a nice stone. Should be considered for a pendant because the fire shows best with narrow end upward.

None…

A crystal seam opal with beautiful play of color on both sides.

A slightly egg shaped freeform oval cut Crystal Seam Opal with a good amount of fire in it.