This valued rock, often chert or obsidian
这是很有价值的石块, 如黑耀石或者燧石

Wang Rui Sun Baoshun Chert Jinyong Yu Zhenhua
河北邢台钢铁有限责任公司

Paleontologists know chert as a good place to look for fossils.
古生物学者知道黑矽石同样的好地方去观看化石。

to rounded quartz with only an occasional chert or limonite grain.
以圆形石英只是偶尔燧石或褐铁矿粮食。

Any of various hard, darkcolored rocks, especially basalt and chert.
暗色岩一种坚硬, 暗色的岩石, 尤指玄武石及燧石

Investigation on alkali reactivity of chert in Nanjing Qixia carbonate
南京二叠系栖霞阶灰岩中燧石碱活性的探讨

IMPLICATIONS OF RADIOLARIAN CHERT FOR THE PALAEOGEOGRAPHY OF SOUTH CHINA
放射虫硅质岩对华南古地理的启示

Response of the PreLopingian Marine Animal Crisis Event in Chert Sequence
前乐平世海洋动物灾变事件在硅质岩系中的响应

Keywords Chert layerhot water sedimentationFeMn depositMotuosarlaXinjiangp
硅质岩热水沉积作用铁锰矿床莫托萨拉新疆

Chert with good abrasion the major content in conglomerate and diamonds are contained in it generally.
砾岩主要砾石成分为燧石，磨圆度较好，普遍含金刚石。

Carbonate rocks are predominantly composed of intraclastic dolostone, chert dolostone and sandbearing dolostone.
碳酸盐岩以内碎屑白云岩, 燧石白云儿和含砂白云岩为主。

Origins and environment types of chert in Western Zhejiang and southern Anhui from late Sinian to Early Cambrian
皖南浙西晚震旦世至早寒武世硅岩物源与环境类型初探

Igneous, metamorphic and sedimentary rocks are all featured including basalt, breccia, chert, gneiss, granite, limestone and pumice.
对火成岩，变质岩以及沉积岩作了更为详细的说明。