Spindle Brooch In 14k yellow gold (56 zolotniks) and silver, with an openwork design of knotted ribbons set with old-cut diamonds, holding two pendants adorned with a type IIb Fancy piriform diamond. Russian work, late 19th century Weight of colored diamonds: 5.90 and 7.79 cts Dim. 6.7 x 5.5 cm, Gross weight: 15.20 g Two LFG certificates (2024) for the colored diamonds: (5.90 cts) Fancy Deep Greenish Grey, SI1 clarity, no fluorescence, type IIb / (7.79 cts) Fancy Deep Greenish Brownish Grey, VS1 clarity, no fluorescence, type IIb With an accompanying letter from the LFG, underlining the remarkable qualities and rarity of these stones (less than 0.1% of gem-quality diamonds). A 5.90 and 7.79 cts Fancy IIb type diamond, diamonds, 14k yellow gold and silver brooch, Russian work from the late XIXth century Two LFG Certificates for the Fancy diamonds: (5.90 cts) Fancy Deep Greenish Grey, SI1 clarity, no fluo, type IIb / (7.79 cts) Fancy Deep Greenish Brownish Grey, VS1 clarity, no fluo, type IIb With an appendix letter from the LFG, underlining the remarkable properties and rarity of these stones (less than 0.1% of the gem quality diamonds) CONDITION REPORT : Good condition, wear patina Colored diamonds: 14.18 x 10.43 x 5.89 and 16.07 x 10.81 x 6.58 mm CONDITION REPORT : Good condition, usual wear Meas. of the Fancy diamonds : 14.18 x 10.43 x 5.89 and 16.07 x 10.81 x 6.58 mm