The colour bar on this pieces looks like it only goes in on the corner. (About 1 cm triangle )That is what the piece is priced on if its bigger then you have extra well.
Seam opal from Glengarry/Grawin. There is a fine red seam on the top. This stone has been priced on the visible coloured portion which is only on approximately a quarter of the top.
Four pieces of light seam opal. Several pieces have fine bands of very bright multi-colour.