Platinum Deco Marquise Diamond and Ruby Cluster

Platinum marquise cut diamond, calculated 0.83ct
Approx colour G, clarity SI 1, rub over set in platinum
Single row of tapered square cut rubies surround the diamond
Approximate combined total weight of twenty stones 0.48ct, all channel set
Original head circa 1930.
Fleur de lis shoulders
D section shank
M
no H/M, tested
4g