Spectrolite (a type of Labradorite) - dark color with spectacular iridescence. Madagascar deposit.
Frame: Designer's, handmade, made of 925 * silver, polished to a glossy shine. In the lower part of the ring shank there is a nameplate and a sample of the State Assay Chamber.
The size of the stone (large) is 25x22x4 mm; the weight of the stone is 2.69 g.