Materials: natural earth-mined diamonds, natural emeralds (likely Russian in origin), silver, 12k rose gold (unmarked; tested with electronic gold tester & nitric-muriatic acid)
Workmanship origin: English or continental European (sourced from Germany)
Weight: 9 grams
Height: 34.8 mm
Width: 28.8 mm
Dimension of diamonds: 30 total- two 3.25 x 2.75 mm, twenty-eight 2×2 mm (approx. 1.38 ctw; 2 x 0.13 ct + 28 x 0.04)
Dimension of emeralds: one 5.25 x 3.75 pearish kite cut, one 3.7 x 3.2 mm, one 3.5 x 3.2 mm, twenty-seven 2.2 x 2 mm (approx. 1.3 ctw; 0.18 + 0.16 + 0.15+ 27 x 0.03)
Condition: this brooch came to me with one emerald replaced as a round cut; my jeweler has restored this round replacement with an appropriate square cut to match the existing emeralds. One diamond was off-center in its setting and thus reset and re-centered. The pendant bail loop to back was added by my jeweler via laser welder. Overall in good condition for age: the gems are preserved whole, without chips or major damages. Minor age-wear includes tarnish to the silver and tiny abrasions and nibbles to the facet junctions of stones.