VTG CHINESE EXPORT VICTORIA STONE Hand-Knotted NECKLACE. Features Sterling Silver Box Clasp marked “Silver” Circa 1930. Imari Stone is a man made lapidary material that was manufactured in Japan. It is no longer being produced and the formula for it’s creation has been lost since the death of it’s creator. It is difficult to find. It is chatoyant with fan shaped swirls across the stone. It is a reconstructed stone with the hardness similar to nephrite jade. It is laboratory produced from natural minerals such as quartz, calcite, fluorspar, Magnesite, and feldspar, etc. This is not a synthetic or imitation but a reconstructed natural stone. And is becoming increasingly hard to find and in turn increasing it’s value.