quartz

• Smoky quartz is the celebration stone for the 70th anniversary
  晶系：六方晶系
• Designation for lumbered synthetic quartz crystal
  人造石英晶体棒材型号命名方法
• 1 generic specification of quartz crystal units erratum 1
  石英晶体装置的总规范
• Specification for round quartz photomask substrates
  圆形石英玻璃光掩模基板规范
• The most popular of these is known as rutilated quartz
  其中最受欢迎的是发晶。
• Standard specification for quartz - based dimension stone
  石英基规格石料标准规范
• 64c rose quartz bracelet 8mm natural rose quartz
  64面粉晶手环8mm天然粉晶手环
• Temperature control devices for quartz crystal units
  石英晶体谐振器的温度控制装置
• Smoky quartz bracelet 10mm natural smoky quartz
  茶水晶护身手环10mm天然茶水晶