Amethyst Shape Heart pink amethyst Moss Tree Agate is a

Moss Tree Agate is a variety of the microcrystalline quartz chalcedony

a yellow color pops on and in some of the crystals

This piece is a natural citrine crystal

and they alter the color differently

Amethyst Shape Heart pink amethyst Moss Tree Agate is aAmethyst is a purple variety of quartz that gets its color from irradiation and inclusions of iron in the crystal lattice. Amethyst has been prized for thousands of years as a gemstone, commonly being used in jewelry. Ancient Greeks believed that amethyst prevented the intoxicating effects of alcohol. Amethyst was considered a precious gem until the 18th century when large deposits were discovered in South America. This piece is polished into a heart