Description
Date: c. 1740-60, mid 18th century
Size: USA 8
Materials: natural earth-mined diamonds, solid 18k gold (unmarked; tested with electronic gold tester)
Weight: 2.3 grams
Workmanship origin: English
Dimension of diamonds: seven total— 5 x 4 mm, 4.6 x 4.5 mm, 4.4 x 4.1 mm, 4.5 x 4 mm, 3 x 2.7 mm, 3 x 3 mm, 1.8 x 1.8 mm
Approx. weight of diamonds: approx. 1.89 ctw (the four largest 0.42 ct, 0.44 ct, 0.36, and 0.35 ct)
Approx. Quality of diamonds: I1-I3, KLM range (two of the diamonds with some carbon inclusions, however diamonds are very lively; please note that most historic diamonds are flawed by modern standards)
Dimension of ring head: 11 x 9.96 mm, 16 x 9.96 mm (including side stones)
Height of ring head: 5.4 mm
Width of shank: 1.17 – 2 mm
Thickness of shank: 0.85 – 1.3 mm
Condition: one of the diamonds with a tiny cavity (loupe-visible only, caused by surface–reaching inclusion), another with an indented natural to edge. Please note that due to their historic bruted girdles, the diamonds in general have rough and somewhat uneven girdle edges, with some bruises, indented naturals, or light bearding (loupe visible only; undetectable with the naked eye). The silver foiling is tarnished in areas, leading to darker shadowy corners when viewed from certain angles. Some nibbles and small losses to the ‘tips’ of the rub-over collet. There is general age-related surface wear and patina throughout.