Is quartz a mineral?
举一反三
- quartz
- 如何区分铁质胶结的石英砂岩和长石石英砂岩？How to distinguish between iron cemented quartz sandstone and feldspar quartz sandstone? A: 通过颜色 | By color B: 通过胶结物成分 | By cement composition C: 通过砂颗粒的矿物特征 | By sand particles Mineral characteristics D: 通过岩石的结构和构造 | By the structure and structure of the rock
- Smoky quartz is the quartz contains trace amounts of: A: Al B: Fe C: Ca D: Mg
- Quartz is natural abrasive.
- What are the the form of silica？ A: alpha quartz B: beta quartz C: tridymite D: Normal atmospheric dusts