Antique Russian Gold Romanov Tsarist Royalty Duke Crown Cipher Royal Arms Brooch

For your consideration is an exceedingly rare and important c. 1890 Imperial Russian old mine / rose cut diamond, sapphire, and Burmese ruby brooch with royal crown / royalty coronet and coat of arms. Coronet features 7 points, each point embellished with an old mine rose cut natural diamond. Constructed from solid 18K yellow gold with 84 silver imperial Russian Ducal / Baron / Baroness / Count / Countess nobility aristocrat crown applique.

The imperial cypher monogram is missing one small ruby. No apparent markings / Kokoshnik / makers marks. Measures approximately 33.0mm x 23.0mm x 3.0mm. Approximately 0.75 ctw diamond, 1.5 ctw Sapphire, 1.5 ctw ruby.

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