玉髓是人类历史上最古老的玉石品种之一。在新石器时代，玉髓就已经作为饰物出现，以后历代绵绵不绝。常见如用作手链、项链和挂坠等随身饰物。玉髓，又名“石髓” ，它是石英（隐晶质）的变种。以乳状或钟乳状产出，常呈肾状、钟乳状、葡萄状等，具有蜡质光。红玉髓是半透明玉髓，质地细腻，晶莹剔透，色泽纯正浓厚。
Chalcedony is one of the oldest jade species in human history. In the Neolithic Age, chalcedony has appeared as a decorative item, and it has been continually in the past. Commonly used as a bracelet, necklace and pendant. Chalcedony, also known as "stone marrow", is a variant of quartz (cryptocrystalline). Produced in the form of milk or stalactite, often in the form of kidney, stalactite, grape, etc., with waxy light. The red chalcedony is a translucent chalcedony with a fine texture, crystal clear and pure color.
玉髓属于“玉石”，但并不属于传统理念上的“玉”。现代把“玉”分成硬玉和软玉两大类，硬玉即翡翠，软玉主要是指新疆的和田玉。而“玉石”的概念比“玉”要大的多，和田玉、翡翠、玛瑙等都属于玉石类，玉髓也是玉石。玛瑙和玉髓的主要矿物成分都是二氧化硅，它们可以称为‘近亲’，但是玛瑙和玉髓还是有区别的。玉髓属于含水石英的隐性晶体，与水晶更为接近，但是玛瑙却是脱水二氧化硅的胶凝体。所以玉髓的通透感极强，而玛瑙就逊色多了。
Chalcedony belongs to "Jade", but it does not belong to the "Jade" in the traditional concept. Hyundai divides "jade" into two categories: jadeite and nephrite. Jadeite is jadeite, and nephrite mainly refers to Hetian jade in Xinjiang. The concept of "jade" is much larger than "jade". Hetian jade, jade, agate, etc. are all jade, and chalcedony is jade. The main mineral components of agate and chalcedony are silica, which can be called 'close relatives', but agate and chalcedony are still different. Chalcedony is a recessive crystal of hydrous quartz, which is closer to crystal, but agate is a gel of dehydrated silica. Therefore, the permeability of chalcedony is extremely strong, and the agate is inferior.
广义的玉髓是一种二氧化硅的集合体，符合玉石的定义，属于玉石之一。广义的玉髓分为三类：普通玉髓、玛瑙以及碧石。其中普通玉髓就是我们平常说的玉髓，它是二氧化硅的含水化合物，包括红玉髓、蓝玉髓、绿玉髓、紫玉髓、黄玉髓、黑玉髓、血玉髓、光玉髓等等。而玛瑙则是二氧化硅的脱水凝胶体，也有很多分类，如南红玛瑙、战国红玛瑙、水草玛瑙、红玛瑙等等。碧石则是含杂质较多的玉髓，从不透明至微透明，价值低廉。那么玉髓的价值有哪些呢?
The generalized chalcedony is a collection of silica, which is in line with the definition of jade and belongs to one of jade. The generalized chalcedony is divided into three categories: ordinary chalcedony, agate and bilith. The common chalcedony is the chalcedony we usually say. It is an aqueous compound of silica, including red chalcedony, blue chalcedony, green chalcedony, purple chalcedony, chalcedony, black chalcedony, blood chalcedony, light. Chalcedony and so on. Agate is a dehydrated gel of silica, and there are many classifications, such as South Red Onyx, Warring States Red Onyx, Aquatic Agate, Red Onyx and so on. Bishi is a chalcedony with more impurities, from opaque to slightly transparent, and low in value. So what is the value of chalcedony?
玉髓的价格也要看玉髓的玉质好不好，一般普通的玉髓价格差不多几十元一克，加厚的玉髓差不多一两百元一克，稍微好点的玉髓价格差不多在几百上千元一克，如果是极品的玉髓，价格差不多在几万到几十万一克了。可见，不同玉质，不同颜色的玉髓，价格是相差甚远的，我们要根据自己的实际情况来选择适合自己的玉髓。玉髓最基本的价值是装饰与美学价值。玉髓作为一种玉石，常作为工艺美术的雕刻原料或制作装饰品，如玉髓摆件、玉髓手镯、玛瑙手链、玉髓吊坠、玛瑙吊坠等等。玉髓的价值有哪些呢?其次，玉髓还有宗教礼仪的价值。如红玛瑙是佛教七宝之一，是人与佛陀的中介物，佛教信徒常用它来向佛陀祈祷，因而红玛瑙深具宗教礼仪的价值。玉髓的价值有哪些呢?最后，优质的玉髓还有投资价值。如普通玉髓中的帝王紫玉髓、金水菩提玉髓、台湾蓝玉髓、澳洲绿玉髓等等优质的玉髓有很高的投资价值。
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