We guaranty authenticity of the moldavite. I have listed wide range of moldavites with various shapes, weight and from various deposites.Size: 19 x 17 x 7 mm - 0.74 x 0.66 x 0.27 inch (10mm0.394in, 125.4mm). Weight: 20.9ct - 4.18 gram. Australia and others: 3-4 weeks. My pledge is to make all my customers happy by providing them with a 5-star customer service.