Gemstones, including rubies, emeralds, and sapphires, can be sold for cash, much the same as diamonds and other jewelry.

Then, High-Value Semi-Precious Gemstones consist of gems like tanzanites, opals, pink sapphires and paraiba tourmalines. Lastly, semi-precious stones include topaz, peridot, amethyst, and more.

It could be five, 10 years before you see a significant increase in value,” he says. “Gemstones are meant to be collected, kept, and passed down. They are things of beauty that when you see ...