Victorian 9ct Gold Micro Mosaic Greek Temple Brooch. The brooch consists of a mosaic of what appears to be a Greek temple inlaid into a piece of onyx mounted in 9ct gold. The brooch has a pin clasp to the reverse. The brooch is not hallmarked but has been tested for 9ct gold. The brooch measures 12mm by 14mm. It weighs 2.3g. There is a little light wear to the front of the brooch but it still presents well.