There are the precious gemstones like diamond, ruby, sapphire and emerald. There are also the semi-precious gemstones like turquoise, amethyst, garnet and quartz. There are also the gemstones that are considered birthstones (like aquamarine for the month of March and peridot for the month of August) and anniversary stones (like blue topaz for the fourth year and onyx for the eleventh year).Know More
A gemstone is a piece of mineral that is used in cut and polished form to make jewelry or other adornments. However, certain rocks or organic materials that are not minerals are also used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value.
Gemstones are classified into different groups, species and varieties. They are also characterized in terms of refractive index, dispersion, specific gravity, hardness, cleavage, fracture and luster. They may also be classified in terms of their "water." This is a recognized grading of the gem's luster, transparency and/or "brilliance." Highly transparent gems are considered "first water," while "second" or "third water" gems are those that have a lesser transparency.Learn more about Precious Metals & Gems
Gemstones are rocks or minerals that can be used for ornamental purposes. To make the gemstones beautiful, the minerals are often cut and polished to produce different shapes and make the stones sparkle.Full Answer >
Diamond is the hardest mineral on the Mohs scale of mineral hardness, with a rating of 10, and is four times harder than the next mineral on the chart, corundum, of which sapphire and ruby are varieties. The Mohs scale is the most common system used for this measurement. It is a relative scale, grading the comparative hardness of 10 common minerals and their resistance to scratching.Full Answer >
Pink gemstones include morganite, pearls and rubellite. Morganite can be a subtle or bold shade of pink. Pearls are available in soft pink, and rubellite is a combination of vivid pink and ruby shades.Full Answer >
To identify raw gemstones, observe their hue, tone and saturation. The transparency, size and heft of a gemstone influences its identification, as does its luster and optical phenomena.Full Answer >