Well this is simple, select your favorite gem... See which are popular, I'm pretty sure I already know the answer though
Except both diamond and Emerald are, too, and arguably so are turquoise and topaz (that could be a curved round cut). The only ones that *definitely* aren't are jade and amethyst.I like how the ruby is the only gem that looks like it is already cut and ready to be set in some jewelry.
100% I've always loved it's look! "Best specimens resemble a desert rose," yeah CA, don't design it like that and then try to deflect the truth.Baryte bc it looks like a bear