Lightning Ridge in New South Wales, Australia is the world's only significant commercial source of black opal - the rarest and most valuable form of opal. Premium quality semi-black and crystal opal is also found in this area. Mining commenced in 1902 and it continues today on approximately two hundred distinct opal fields.
Dark seam opal with consistent pattern throughout in greyish base. Best with bright light
straight-on, so it's difficult to photograph. Shows okay in moderate light.
Really interesting opal. Subtle blue floating inside the crystal-clear opal with
"3-D" inclusions in back. Saw one like it in national publication for hundreds more!
Large black seam opal. Lots of blue and some green. Another stone that makes a large
presentation for a small price. Would look good in any style setting.
Large quirky piece with some nice blues in the black potch base. The bulls-eye pattern
of the white potch rings in the center make this one rather interesting.
Slightly better seam opal with more translucence and more color. Lots of blue,
some green, and a small hint of red hiding inside. Nice large piece.
Nice bright picture stone. Will make an impressive pendant or a really large
ring. Local retail shop has one like it for $350/ct. You get a real bargain here.