fluorite , auch: fluorspar
fluor

Fluorite has been the state mineral of Illinois since 1965.

Fluorite also has poor shape retention and is very fragile.

In any case, careful handling of fluorite lenses is a good idea.

It is quite soft, with a hardness 4, the same as that of fluorite.

Some are placed on an iceberg of fluorite crystals in the shop.

It is rich in Fluorite and hot spring resorts.

That was just a common fluorite crystal, but I figured it wasn't likely he'd ever seen one.

For the search, naturally, we'll use a fluorite camera.

Fluorite was then shown to be mostly composed of calcium fluoride.

Fluorite also gave the name to its constitutive element fluorine.

Specific gravity is 3.02, a little lighter than fluorite.

Fluorite is a mineral found in the earth.

Mined fluorite is separated into two main grades, with about equal production of each.

These are low dispersion glass, most notably, glasses containing fluorite.

They are actually clones of Fluorite that aid her in her plans.

Fluorite telescopes are all the rage now among astronomers, my star-gazing friends tell me.

Fluorite was extracted from the area during the 1930s and 1940s.

Fluorite has a uniquely high transparency at this wavelength.

The fluorite also serves to correct optical aberrations in these lenses.

His name is taken from a type of fluorite found in Derbyshire, England.

No matter whether they're made of fluorite, or some equivalent exotic material, I love having them.)

"The men are spread out over the eighth floor according to plan, taking continuous pictures with fluorite cameras.

It is made by reacting fluorite with sulfuric acid.

It occurs associated with fluorite and zircon in the type locality.

Absently he fingered the small crystal of fluorite he'd slipped into his pocket.