LISBON CUT Twin Diamond Earrings

LISBON CUT Twin Diamond Earrings
Open-set Diamond Earrings, Lisbon-cut & very early Old Mine Cushion Cut diamonds, approximately .80 carats;
silver collets and gold back-to-front wires.

Diamonds : In each earring, one early oval-rectangular cushion cut variant 3.7 x 3.0 x depth 1.7mm
(estimated .35 carat, the pair);
above one near square Lisbon/Mazarin variant 3.5 x 3.5mm x depth 2.5mm (.45 carat, the pair) Total of the four estimated, .80 carat, within limitations presented by the cuts, proportions, and style of setting.
Hallmarks : none found
Period : diamond cuts late 1600's to circa 1720's;
earrings hard to date with certainty, circa 1780's - 1850,s
Size : total length 9/16" / 1.4 cm.
Gross weight : pr, .0775 troy ounce / 2.42 grams
Gold tested : 18k
Ear wires : solid back to front, hand-made hinge, fastening into gold ring above top diamond of each earring.
Metals : silver 'pinched'('cut-corner') collets, open "a-jour" in back.
Condition : excellent
# 30007 e ................................... SOLD