1970s Vintage Gold and Agate Gents Ring. This ring looks as fresh today as it did in the 1970s. This ring features a floral pattern in 18K yellow gold and central Agate oval cabochon stone which measures aproximately 17.5mm x 11.5mm. Agate is the Mystical birthstone for September. It is also the birth stone for the Zodiac sign of Gemini. This ring weighs approximately 13.5 grams. The stone is natural and untreated. Currently a size 7. Track Page Views With. Auctiva’s FREE Counter. The item “Men’s Large Vintage 1970s 18k Gold & Red/Orange Agate Ring” is in sale since Saturday, March 14, 2015. This item is in the category “Jewelry & Watches\Vintage & Antique Jewelry\Fine\Men’s Vintage Fine Jewelry”. The seller is “californiawatchco” and is located in Los Angeles, California. This item can be shipped worldwide.