This is a beautiful brooch and has been professional appraised . The brooch is set in 10K yellow and rose gold, with 18K yellow gold (tested) surrounding the center 3 amethysts.
The brooch measures approximately 2 1/4" long. It has 4 faceted Natural Amethysts that measure approximately 6.0MM in diameter.
Makers mark and stamped 10K, condition is excellent. Total weight: 4.5 grams
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Vintage & Antique Collectibles Jewelry, Gold and Sterling