Smoked quartz and diamond pendant in 18 carat gold

An 18 carat rose gold pendant and chain with a square faceted smoked quartz stone and 31 brilliant cut diamonds. 

The diamonds are .23 carat in total, VS to SI1 in quality and H in color. The smoked quartz measures 9 mm square. The chain is 40 cm in length, the pendant and chain together weigh 4.5 grams. 

The pendant, stones and chain are in very good condition.