Type of jewel: Vintage 14K gold ring with colour changing stone (alexandrite-like) Condition: In well-preserved condition, especially given the jewel`s age. Country of origin: Poland Style: Vintage Era: ca. 1950 Material: 14K yellow gold and red gold (touchstone tested) Precious stone(s): Synthetic corundum with alexandrite like colour change properties, showing a distinct shift under different light sources (artificial light versus daylight), ranging from bluish purple to green, with an estimated weight of approximately 12.00 ct. Please look at the photos to see the colour difference under different light sources. - All gemstone weights are approximate, as the stones are not removed from their settings to preserve the integrity of the piece. Hallmarks: Polish hallmarks mid 20th century for 14K gold Dimensions: top of ring 1,90 cm (0,75 inch) x 1,60 cm (0,63 inch) - See picture with a ruler in cm and inches Weight: 6,70 gram (4,31 dwt) Ring size: EU-52 & 16½, USA-6 , UK-L Ring sizes are professionally measured and rounded to the nearest millimetre; slight variations are standard and do not affect wear. Adin reference Nº: 26019-0127 - All jewels are delivered in an Adin jewellery box. Boxes shown in photos are display props unless stated otherwise. - Every piece is accompanied by an Adin certificate of authenticity for your piece of mind. Adin has specialised in antique and vintage jewellery in Antwerp for over four decades. We maintain professional memberships and affiliations that reflect our ongoing commitment to standards, research, and responsible trade practice. - Shipped insured and registered. Collection in person is also welcome. - For shipments outside the EU, import duties and other charges may apply. We advise checking this in advance. - We invite you to browse through our customer feedback to discover the level of satisfaction we consistently provide. - See more of our pieces: https://auction.catawiki.com/lotsfrom/Adin - Antique and vintage jewellery may show evidence of past repairs or restoration, reflecting normal wear and period use. We present pieces in an authentic state and do not routinely remove surface marks or apply rhodium plating to white gold. If you prefer a brighter finish, you may choose a cosmetic refresh by a local goldsmith.