Chert is a type of hard, microcrystaline quartz that is composed of chalcedony. A large amount of this rock is derived from the silicaceous skeletons of microscopic marine creatures called radiolarians. Other kinds form in non-marine environments where sedimentary rocks have been washed out and replaced by silica. Chert has a very fine grain size, and can be colored anywhere from white to gray to black. It occurs in massive layers as well as in the form of nodules in chalk or limestone. There is no clear distinction between chert, chalcedony, flint, jasper and agate — any names that are used in this group are almost entirely subjective. This stone has a dull, pearly, or sub-vitreous luster and a colorless streak.
| Other Names: |
Hornstone |
| Chemical Composition: |
Silicon Dioxide
SiO2 |
| Color: |
Variable, From gray to black |
| Hardness: |
7 |
| Specific Gravity: |
2.55 - 2.65 |
| Cleavage: |
None |
| Fracture: |
Conchoidal |
| Origin: |
Marine |
| Grain Size: |
Very Fine |
| Crystal Structure: |
A form of chalcedony resembling flint but is more brittle.
Transparent to Opaque |
| Luster: |
Dull, Pearly or Sub-vitreous |
| Streak: |
Colorless |
| Occurence: |
Worldwide |
| Astrological Sign: |
Leo |
| Numerical Vibrations: |
2 and 9 |
| Magical Properties: |
- In addition to the properties of chalcedony listed in this site, the following attributes also apply.
- Can be used to provide stability and to assist one in remembering, both during the daily routine and during specific times when one decides to either "look-bak" at this life or to view previous lives. It can also be used to help one to find lost items.
- Was important in the ceremonies of the Algonquin Indians. It is said to have been used as an implement in which to request the presence of the spirit guides.
|
| Medical Properties: |
Can be used in the treatment of chemical imbalances, to soothe allergic reactions, and to aid in the decrease of fatty deposits. |
