(Lot Of 3) Lindenwold's Fine Jewelers 5-6mm White/Red Cubic Zirconia Gemstones.

(Lot Of 3) Lindenwold's Fine Jewelers 5-6mm White/Red Cubic Zirconia Gemstones. The stone is a cubic zirconia (CZ) from Lindenwold's Fine Jewelers. It is a round-cut, 1-carat, lab-created diamond simulant. Cubic zirconia is made of zirconium oxide and has a hardness of 8.5 on the Mohs scale, making it harder than most natural gems. It is a popular alternative to diamonds due to its similar appearance and lower cost. The pictured CZ was likely produced in the 1990s. Based on the image and search results, the stone is likely a ruby or a cubic zirconia simulant from Lindenwold Fine Jewelers. Lindenwold's is known for producing cubic zirconia stones, but they have also sold rubies. The stone in the image appears to be a round-cut, red gemstone, which aligns with the appearance of both rubies and some of Lindenwold's cubic zirconia.  Cubic Zirconia: A lab-created diamond simulant, known for its brilliance and clarity. It is less hard than a ruby (8-8.5 on the Mohs scale) and is often flawless.  It is difficult to identify the stone definitively without further testing. However, considering it is packaged by Lindenwold Fine Jewelers, and they are known for cubic zirconia, it is more likely to be one of their simulants.