This listing is a Brilliant London Blue Topaz. It is a cushion cut faceted gem. The dimensions of this stone are16mmx16mmx10mm deep.
The brilliance of the faceting on this stone is what drew me to it.The opposed bar facet arrangement makes for an extremely lively present to this piece. An 18kt yelloww setting with diamond melee would work into a stunning ring or pendant. Still as attractive to me as it was when I purchased it 30 years ago.