Vintage 9k 9ct Gold Onyx & Diamond Signet Ring 1994 Hallmarked Oval Solid 375 Black Gemstone Mens Womens Jewelry cluster leading me to believe it's

leading me to believe it's a natural stone but I'm not 100% sure without sending it of for a laboratory test

yellow gold and white gold

adorned with a genuine diamonds and natural seed pearls

The earrings are stamped "9ct" and the overall condition is good

They weighs a combined total of approx

Vintage 9k 9ct Gold Onyx & Diamond Signet Ring 1994 Hallmarked Oval Solid 375 Black Gemstone Mens Womens Jewelry cluster leading me to believe it'sDESCRIPTION: A genuine vintage 9ct 375 yellow gold signet ring, adorned with an onyx gemstone with a diamond centre (100% tested). The ring is fully hallmarked for 9ct gold, dating 1973. It sizes approx. at UK N or US 6. 75 and weighs approx. 3. 72g. As to be expected with age and use, the item has some marks and scratches on it. It has some dark patina on the inside.