The results show that there are two types,one is chalcedony-type silicified wood,which consists of cryptocrystalline quartz and a little granular quartz,with refractive index of 1.
采用偏光显微镜和红外光谱仪对缅甸硅化木样品进行研究,结果发现,其有两种类型,一种为玉髓硅化木,主要由隐晶质石英和少量的粒状石英组成,折射率为1。
The experiment indicates that the basalts containing chalcedony and microcrystalline quartz possess potential alkali reactivity and belong to typical alkali-silica reaction.
结果表明,由含有玉髓、微晶石英等矿物的玄武岩骨料具有潜在碱活性,且属典型的碱-硅反应。
The nodular chert consists of mainly of microquartz,length-fast chalcedony and megaquartz with minor length-slow chalcedony,euhedral dolomite rhomb and sparry calcite as well.
研究区燧石结核主要由微石英、负延性玉髓、粗晶石英组成,并含少量白云石、方解石及生物碎屑。
An apple-green chalcedony used as a gemstone.
绿玉髓用作宝石的苹果绿色的玉髓
a deep orange-red variety of chalcedony.
一种深橙红色的玉髓。
sard and sardonyx
肉红玉髓和缠丝玛瑙
A light green or light grayish-green variety of translucent chalcedony.
葱绿玉髓浅绿或浅灰绿的各种半透明玉髓
A pale to deep red or reddish-brown variety of clear chalcedony, used in jewelry.
光玉髓，红玉髓明净的玉髓的一种浅色至深红或红棕色的变体，用于制珠宝
a green slightly translucent variety of chalcedony used as a gemstone.
一种略微透明的绿色玉髓，用作宝石。
a green variety of chalcedony valued as a gemstone.
一种绿色的玉髓，视作宝石。
a translucent red or orange variety of chalcedony.
一种半透明的红色或橙色玉髓。
a chalcedony with alternating black and white bands; used in making cameos.
黑白带纹相交的玉髓，用作浮雕宝石。
A variety of deep-green chalcedony flecked with red jasper.
鸡血石，血滴石一种上有红色碧玉斑点的深绿色玉髓
The ribbon stones are consisted of different color pebbles such as agate, chalcedony, jasper and quartzite.
纹石系由五颜六色的玛瑙、玉髓、碧玉、石英岩等卵砾所组成。
The major varieties of queer stones are grape agate, jasper, chalcedony, Jigu stone, Qianceng stone, Desert qishi, "Desert rose" and so on.
主要品种有葡萄玛瑙、碧玉、玉髓、集骨石、千层石、沙漠漆石、“沙漠玫瑰”等。
A siliceous rock of chalcedonic or opaline silica occurring in limestone.
硅石出现在灰岩中的玉髓或蛋白色硅石
a hard kind of stone; a form of silica more opaque than chalcedony.
一种硬石，硅石的一种形式，透明度不如玉髓。
Reporting Analysis of a Sheep-Head Carving of jade Found in Wanquan County;
关于在万全县发现的玉髓羊头像的分析报告
an onyx characterized by parallel layers of sard and a different colored mineral.
一种缟玛瑙，特点是有红玉髓和另一种有色矿物的平行层面。
an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles.
一种不纯的石英，由带纹玉髓构成，用作宝石及制作研钵和杵。
any of various gems (as chrysoberyl or chalcedony) that reflect light when cut in a rounded shape.
切成圆形后能反射光线的各种宝石（如金绿石或玉髓）。