Calcite

方解石

The varieties of calcite, CaCO₃, are so numerous and so varied that an entire display case at the Smithsonian Museum of Natural History is devoted to just calcite. Calcite is the most abundant of the carbonate minerals.

方解石（CaCO₃）的种类非常多，差异也很大，以至于美国自然历史博物馆有一个整个展柜专门用来陈列方解石。方解石是碳酸盐矿物中最为常见的种类。

A calcite sample which looks something like a cactus. From the Santa Rita Mountains of Arizona. The top is about 3 cm across.

看起来像仙人掌的方解石样本。来自亚利桑那州圣拉 Rita山脉。顶部宽度约为3厘米。

Calcite growing with metallic copper. Calcite crystal about 3-4 cm across. From the Keweenaw Peninsula, Michigan.

碳酸钙与金属铜一起生长。碳酸钙晶体直径约3-4厘米。来自密歇根州凯韦纳半岛。

Calcite formation from Coahuila, Mexico. Sample 8-10 cm across.

墨西哥科阿霍拉州的方解石形成。样本宽8-10厘米。

Three more of the almost endless variety of calcite growth patterns. The left sample is about 15 cm across.

三种钙盐生长模式中的更多例子。左侧样品的宽度约为15厘米。

Calcite formed with sphalerite, the black crystals, and with fluorite, purple crystals. The calcite is in the form of two large twinned crystals. Elmwood Mine, Smith County, Tennessee. Calcite crystal about 25 cm.

与方解石一起形成的有斑铜矿，黑色晶体，以及 fluorite，紫色晶体。方解石以两个大双晶晶体的形式存在。Elmwood Mine，田纳西州Smith County。方解石晶体约25厘米。

Calcite with sand inclusions from Fontainebleau, France. The left sample is about 8x15cm.

来自法国Fontainebleau的方解石，含有砂质包裹体。左侧样本尺寸约为8x15厘米。

The small x-shaped sample is calcite with sand inclusions from Washabaugh County, South Dakota. The large sample is calcite with sand inclusions from Snake Butte, South Dakota. This is a section of a large sample of about a meter height.

这是一个来自南达科他州瓦沙布县的含砂包裹体方解石小样本。较大的样本是来自南达科他州蛇丘的含砂包裹体方解石。这是大约一米高的大样本的一部分。

The larger sample of calcite is about 20x30 cm and is an example of what is called hopper crystal growth. This implies that the outside of the crystal has grown much faster than the inside, leaving the inside as a hollow stair-stepped structure. This sample is from Attendorn, Nord Rhein-Westphalen, Germany. The smaller sample is also a hopper crystal of calcite and is from Crystal Run quarry #2, Lecantu, Florida.

较大的方解石样品尺寸约为20x30厘米，是所谓‘hopper晶体生长’的一个例子。这表明晶体的外层生长速度远快于内部，使内部形成一个阶梯状的空心结构。该样品来自德国北莱茵-威斯特法伦州的Attendorn。较小的样品也是方解石的hopper晶体，来自佛罗里达州Lecantu的Crystal Run矿场#2。

This calcite in stalagmite form is from Quanshi, Quilin, China. The sample is about 40 cm across.

这种石英在钟乳石形式下来自中国 Queensland。样品的直径约为40厘米。

This sample is described as manganoan calcite. It is about 15cm wide and is from Montreal mine, Montreal, Wisconsin.

这种样本被描述为磁铁矿钙盐。它宽约15厘米，来自威斯consin州蒙特利尔矿。