nd showing its brilliant colours in the cious stones is the art of the lapidary, and this art we sunshine, and picking it up, we have will now proceed to consider in its practical working. carefully stored it away, intending to save it as a The diamond, which is the hardest substance known,… … slices and polished, its beauty instructions for amateurs more FIG. I. — SELF-ACTING APPARATUS FOR SLITTING AND POLISHING ROCKS, PEBBLES, FOSSILS, ETC. is increased tenfold. clearly understood. PERSPECTIVE VIEW. In all ages, and by all The principal seat of the people, beautiful stones have been…
Industrial arts · Handicraft
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