PRECIOUS GEM STONE COUNTERTOPS (Amethyst)Make your home a true gem with real precious gem countertops. This Amethyst application is the perfect stone for true backlit beauty. Let Robert Stone Inc. design and customize your gem stone countertops today.PRECIOUS GEM STONE COUNTERTOPS (Amethyst)Make your home a true gem with real precious gem countertops. This Amethyst application is the perfect stone for true backlit beauty. Let Robert Stone Inc. design and customize your gem stone countertops today.