Gemstone Jewelry Buying Guide

Precious vs. Semi-Precious Gemstones

The distinction between precious and semi-precious gemstones probably most reflects the perceived availability of the respective stones in historic times. Stemming from the ancient Greeks, the traditional differentiation of precious and semi-precious gemstones was rarity: diamond, ruby, sapphire and emerald were considered precious, while all other gemstones were considered semi-precious. In modern times, the terms in a commercial context are less likely, due to the significant range of quality, availability, size and cost of all gemstones in today’s marketplace.

Lab-Created Synthetic and Simulated Gemstones

Resembling the beauty of more costly genuine gemstones, lab-created synthetic and simulated stones have been popular in jewelry for many hears. It is important to know, though, that the value of these imitations varies greatly, and their everlasting beauty depends on the kind of gem they are.

Lab-created synthetic gemstones are typically similar in composition to their naturally occurring mineral counterparts, but they are grown in a controlled laboratory environment to yield a similar result.

Simulated gemstones are look-alike substitutes for genuine gemstones. Because simulated stones are imitation and not made from the same minerals, they cost less and usually have no flaws, but they may not behave in the same way as their natural counterparts with respect to brilliance, sparkle, hardness or longevity.

Gemstone Jewelry Buying Tips

Know the “Quality” of the Gemstone

Identifying the quality level of the stones used within gemstone jewelry ensures that the gemstone rings, necklaces or other pieces you purchase retain their value. Colored gemstone valuation may be more subjective and can be more complicated than valuing diamonds. However, as with diamonds, starting with the Four Cs can be helpful:

• Color – The color of the gemstone affects its value and how it shows in the jewelry. Generally clear, medium-tone, intense and saturated colors are the most preferred. Avoid stones with color that is too dark or muddled. The brighter and more vivid the color, the better.
• Clarity – After color, gemstone clarity is the next most important factor. Clear, transparent gemstones with no visible flaws (inclusions) are the most valued. Clarity can be difficult to judge, but if flaws aren’t visible in the face-up position, then they rarely matter. Some gemstone varieties, such as emerald and red tourmaline, are rarely seen without inclusions. It is important to consider clarity within the gemstone variety, and not against other gemstones.
• Carat – Colored gemstones are sold by weight, not by size, and prices are calculated per carat. It’s important to recognize that some gems are denser than others, so similarly sized stones of different varieties may differ greatly in cost. In addition, larger stones of some varieties can be quite rare and much more expensive – such as ruby, emerald, sapphire and tourmaline.
• Cut – Cut is an important factor in determining a stone’s beauty and perceived value when it is set in gemstone jewelry. A good cut is something that may not cost more but can add or subtract substantial beauty. A well-cut faceted gemstone evenly reflects light back across its surface area when held face up. Many different cut shapes are available, and it’s important to consider cut in relation to the jewelry style you’re considering. The best way to judge cut is to look at similar gemstones next to each other. Shop Online