Amethyst Vs. Quartz

Amethyst is a very popular gemstone composed of silicon dioxide.^[1] Quartz is also a very popular gemstone and its chemical composition is also silicon dioxide.^[2]

Quick Facts on Differences of Amethyst and Quartz

For a quick recap of the differences amethyst and quartz:

• While both amethyst and quartz can be translucent or transparent, quartz can be opaque.
• While both amethyst and quartz is vitreous, in terms of luster, quartz can be greasy or waxy.
• Amethyst can be commonly purple while quartz can be commonly red or yellow.

Quick Facts on Similarities of Amethyst and Quartz

The similarities of amethyst and quartz include:

• In terms of crystallography, amethyst and quartz both can be hexagonal or trigonal.
• For chemical formulas, amethyst and quartz both are SiO2.
• Amethyst and quartz both streak white.
• Amethyst's rarity is similar to quartz.
• Amethyst's hardness is similar to quartz - they both are 7 on the Moh's scale.
• Amethyst's specific gravity overlaps with quartz - amethyst is 2.651 and quartz ranges from 2.651 to 2.91.

Summary of Amethyst

Amethyst is a mineral that belongs to the quartz family and is known for its purple color. The color of amethyst can range from pale lilac to deep purple, depending on the concentration of iron and other trace elements present in the crystal. It is a popular gemstone and is often used for jewelry, decorative purposes, and spiritual healing.

Summary of Quartz

Quartz is a mineral that is composed of silicon and oxygen atoms arranged in a continuous framework of SiO4 silicon-oxygen tetrahedra. It is one of the most abundant minerals found in the Earth's crust. Quartz can be found in a variety of colors such as white, pink, purple, brown, gray, and black. It is also known for its unique crystal structure, which is hexagonal in shape, and its hardness, which is 7 on the Mohs scale.

Table Comparison of Amethyst vs Quartz