Silver Ruby Sapphire Laboratory Ruby
H 3.50 cm (1.38 in) | W 6.00 cm (2.36 in)
Origin: United Kingdom, c. 1920
Case: Fitted Case
Condition: Very good
Weight: 20.60 Troy Ounces (640.66 grams)
Arts & Crafts Double Circle Brooch with fabulous colouring of natural rubies & sapphires.
The two cabochon genuine laboratory rubies have the same chemical composition, crystal structure, optical & physical properties as mined rubies & have the same Mohs hardness of 9.
They were first made in Switzerland in 1880 & would have cost the same as natural rubies. They were chosen for their purity & colour.
cf. Silver Jewelry Designs
Nancy. N. Schiffer, 1996, illustrated page 105