I am pleased to offer from my private collection this absolutely amazing and historically important antique demantoid pin made c1920. DEMANTOID ART DECO GATSBY ERA PLATINUM DIAMOND PIN. Vintage geometric design roaring 1920s design stick pin. Demantoid approximate 1.88 carat. 8.1 millimeters x 6.05 millimeters x 3.91 millimeters. DEMANTOID HAVE A GREAT DISPERSION AND ADAMANTINE LUSTER. The pin has European hallmarks. Platinum bezel and 14 karat gold. European cut diamond 0.10 carat bezel set underneath the demantoid for accent. PIN TOTAL DEMANTOID AND DIAMOND APPROXIMATELY 2 CARAT. Platinum top is 11.5 millimeters x 6.5 millimeters. Diamond diameter 2.85 millimeters. VINTAGE PLATINUM AND 14K GOLD PIN. Platinum and 14k gold - 1.62 grams. Antique vintage royal era pin. 59 millimeters - 2 5/16" inch long. 3 different hallmarks. One on the side of the pin, One on the curved part that attaches to the Demantoid, One on the back of the Demantoid bezel. Please observe pictures carefully. MUSEUM QUALITY WORK OF ART. BUY IT NOW BEFORE IS GONE FOREVER. I HAVE BEEN SELLING JEWELRY FOR OVER 27 YEARS, SINCE 1999. I DELIVER EXCELLENT SERVICE AND HARD TO FIND RARE AND ESTATE JEWELRY FOR MY CUSTOMERS AT AFFORDABLE PRICES. I AM AN HONEST AND RELIABLE AND REPUTABLE SELLER. PLEASE TAKE THE TIME TO READ MY FEEDBACK AND BID WITH CONFIDENCE. I HAVE MANY REPEAT CUSTOMERS. THE JEWELRY I FIND AND MAKE FOR 47 YEARS IS RARE AND HIGH QUALITY. I SELL IT FOR AMAZINGLY LOW PRICES. THANK YOU FOR LOOKING AT MY STORE AND AUCTIONS. Diamonds measured and graded while set as setting allows. Weight calculated by formula and all grades and weights are approximate. We are professional, GIA trained gemologists and appraisers and are family have been in this business over 47 years. NOTE: PLEASE OBSERVE CAREFULLY THE PHOTOS! IT IS A SIGNIFICANT PART OF THE DESCRIPTION. Every possible defect which is shown in the photos, but not mention in the description, will be considered described. All the photos shoot by professional macro lens under 10x magnification, so you can explore even the smallest detail like under microscope! Terms, conditions and disclosures and other guidelines are incorporated herein by reference.