Stone: Sapphire. Quality: AAA. Size: 0.8mm, 0.9mm, 1mm, 1.25mm and 1.5mm. Shape: Round. The mm tolerance is +/- 0.2 mm. 0.8 mm: 0.004 carat. 0.9 mm: 0.005 carat. 1 mm: 0.006 carat.