A popular treatise on gems, in reference to their scientific value; a guide for the teacher of natural sciences, the jeweller, and amateur: together with a description of the elements of mineralogy, and all ornamental and architectural materials .. (1859)
Feuchtwanger, Lewis. [from old catalog] · New York, D. Appleton & company · leaf 304
at right angles; itpossesses some double-refracting j)ower.Sometimes a ray of light, resembling thatof the star-sapphire, may be perceived iniolite, particularly when cut; it has avitreous lustre; its colors are violet-blueand indigo-blue, sometimes with a tingeof black and bluish-gray. It… … Fig. 11. 298 A POPULAR TREATISE ON GEMS. fuse on the edges, and becomes then a grayish-greenenamel: borax fuses it into a diaphanous glass ; acids haveno effect upon it; it consists of magnesia, alumina, andsilica, with some oxide of iron and water. It is often found under the names of lynx and…
Precious stones · Building stones · Mineralogy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from One thousand processes in manufactures and experiments in chemistry / [Colin Mackenzie]. (1825)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b29307867-270-7.webp)
![An illustration from One thousand processes in manufactures and experiments in chemistry / [Colin Mackenzie]. (1825)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b29307867-270-6.webp)
