Mothers Day Jewelry, and Baby Charm. She might like charms that relate to her babies. So, refer to our chart and personalize your gift with a ruby, opal, amethyst, or other stone that their births correspond with. If she would prefer, we have ones with diamonds--just click on the left and see our selection. Here are some interesting facts about diamonds. They occur most often as euhedral or rounded octahedra and twinned octahedra known as macles. The processes, which include cleaving, sawing, cutting, and polishing, are usually known collectively as diamond cutting. The saw is a thin metal disk, the edge of which is impregnated with a mixture of diamond dust and oil. In 1726 diamonds were discovered in brazil, and in 1866 in south africa. It is likely the rose cut is a design adopted from india, as many of the historical indian diamonds were fashioned in this manner although less symmetrically, as indian cutters sought to minimize wastage.