Gold ring with smoky quartz 20th century 70th year Gold, proof 583, smoky quartz (rectangular shape with broken corners - 13 ct, brown, stone quality VVS (very high purity)). A luxurious gold ring of the Riga jewelry factory, inspired by the 18th century. rococo traditions. With hand and plant motif. Large rectangular faceted smoky quartz. Weight 7.9 grams, 17 mm