GEOLOGY

Detailed explanation-1: -Quartz and feldspar are rock-forming minerals. Both these contains silicon and oxygen atoms. However, their compositions are different from each other. Therefore, the key difference between quartz and feldspar is that the major chemical element present in quartz is silicon whereas in feldspar it is aluminum.

Detailed explanation-2: -Quartz exists in two forms, the normal -quartz and the high-temperature -quartz, both of which are chiral.

Detailed explanation-3: -Quartz exists in two forms: (1) alpha-, or low, quartz, which is stable up to 573 °C (1, 063 °F), and (2) beta-, or high, quartz, stable above 573 °C. The two are closely related, with only small movements of their constituent atoms during the alpha-beta transition.

Detailed explanation-4: -Popular varieties of quartz that are widely used as gems include: amethyst, citrine, rose quartz, smoky quartz, and aventurine. Agate and jasper are also varieties of quartz with a microcrystalline structure.