Is the 0.6-carat ruby collectible?
No, according to the official website of the National Jewelry and Jade Quality Supervision and Inspection Center, rubies with good quality can be collected over one carat, while rubies below 1 carat have no strong collection value. One carat is 0.2g, and 0.6 carat is 0. 12g, which is basically of no collection value.