Ring i 10 karat gold with London Blue Topaz. The ring belongs to the Rainbow collection, creating combinations of gemstones in all the colours of the rainbow. This ring is made in 10-karat gold, and is stamped with 417, which means that it contains at least 41,7% pure gold. Their 10-karat gold is certified Conflict-Free which ensures that the gold is not extracted in conflict areas. Material: Gold Karat: 10K Stone: Topaz Stone Colour: Blue Number of Stones: 1 Stone Shape: Round Brilliant Stone Setting Type: 4 prong Available sizes: 48,50,52,54,56,58 Does it come with certificate? Yes Can the piece be engraved? No