Antique Platinum Gold Boulder Opal Cameo Pendant Necklace

One boulder opal cameo within mosaic of opals. Opal cameo has powdery blue background with blue, green and red flashes, black patch on neck, good luster, backed by boulder. Opals: deep violetish blue to medium blue to light blue backgrounds, green, yellow and some red flashes, minor crazing on violetish blue opal, several chips. 3 old-European-cut diamonds total approx. 1.05ct, small old European and single-cut diamonds, H-I/VS. 2 rectangular-cut emeralds. Delicate platinum link chain. Circa 1905.

Weight: 29.9 grams
Measurement: 61.0cm chain length, 7.3 x 3.7cm pendant.