Drops of clear quartz, lapis, London blue topaz and mother-of-pearl in 18K yellow gold. From Ippolita. Imported. 18K yellow gold/clear quartz/lapis/London blue topaz/mother-of-pearl. Size: 7. Almost all gemstones and black diamonds have been treated to enhance their beauty and require special care. Photo may have been enlarged and/or enhanced. Ring Size Chart.