feldspar [ˈfɛldˌspɑr, ˈfɛl-]

例句:

• Jadeite jade consists of minerals of pyroxene, amphibole and feldspar groups.
  翡翠由辉石族 、 角闪石族、长石族矿物组成.
  
• The team says the sample contains "significant amounts" of the minerals feldspar, olivine and pyroxene.
  来自BBC
• Industry: petroleum, diamonds, iron ore, phosphates, feldspar, bauxite, uranium, gold.
  工业: 原油, 钻石, 铁矿, 磷酸盐, 长石矿, 铝氧石, 铀, 黄金.
  
• Feldspar commonly used are: granite a long stone set fire to rocks.
  常用的长石主要有: 花岗岩、霞硌、正长石等火烧岩.