Although amethyst, the purple variety of quartz, and citrine, the yellow/orange variety of quartz belong to the same scientific mineral classification, they have always been distinguished as individual … Some important gemstones are not here yet. We are constantly working on expanding this list.

Amethyst quartz - the mineral and gemstone kingdom mixture of amethyst and milky quartz (or clear quartz). It is purple on top and white or clear on the bottom. It may also be banded purple and white. Amethyst amethyst, the purple variety, is the most popular and valuable quartz gemstone. Amethyst ranges from light to dark purple. See the amethyst gemstone page for more details. Citrine citrine is …

Amethyst ranges from light to dark purple. See the amethyst gemstone page for more details. Citrine citrine is … Amethyst is the purple variety of the mineral quartz, and is its most famous and valuable gem variety. Quartz also contains other gemstones such as citrine, rose quartz, and smoky quartz. The color of … Citrine is the yellow to brownish-red variety of the mineral quartz. It is a widely used as a gemstone, and after amethyst it is the most popular quartz gem. Most citrine is formed by heat treating purple … Amethyst is a well known mineral and gemstone. It is the purple variety of the mineral quartz, and its most valuable and prized variety. Its name derives from the greek amethystos, which means not …

The color of … Citrine is the yellow to brownish-red variety of the mineral quartz. It is a widely used as a gemstone, and after amethyst it is the most popular quartz gem. Most citrine is formed by heat treating purple … Amethyst is a well known mineral and gemstone. It is the purple variety of the mineral quartz, and its most valuable and prized variety. Its name derives from the greek amethystos, which means not … Detailed description, properties, and locality information guide about the mineral corundum: Ruby and sapphire.

Amethyst is a well known mineral and gemstone. It is the purple variety of the mineral quartz, and its most valuable and prized variety. Its name derives from the greek amethystos, which means not … Detailed description, properties, and locality information guide about the mineral corundum: Ruby and sapphire.

Ruby and sapphire.