You can tell if they are gemstones, because their tongues are funny colours
Aquamarine, Tourmaline, Beryl, Garnet, Amber, Onyx, Moonstone, Peridot, Spinel, Zircon, Carnelian, Turquoise, Topaz, Agate, Lapis Lazuli, Jade, Chrysoberyl, Tanzanite, Emery, Opal and Amethyst. There...
A gemstone can be a precious or semiprecious stone, a mineral crystal, or a mineraloid (such as amber) which can be used to fashion an object of adornment or beauty.
Any material which has the three basic qualities of beauty, rarity and durability can be fashioned as a gemstone.
Amber is different because it is made of tree sap. Amber is not a mineral but an organic product.
yes, a ruby is in fact a gemstone.The red color is caused mainly by the presence of the element chromium.