Brown & Co. Jewelers
Buckhead (404) 814 9800 Roswell (770) 993 1080

What are Gemstones?

Precious stones, or gemstones, are rare minerals that are cut and polished specifically for a piece of jewelry. They come in virtually every color of the spectrum, and one type of gem can occur in various hues. For example, sapphires can be found in blue, yellow, pink, and a wide range of other colors. Other notable gemstones include turquoise, jade, rubies, opals, and topaz. Each of these gemstones offers its own unique color, hue, and texture — complementing a variety of different styles. No matter your style, there is a gemstone that perfectly complements it.

Types of Gemstones


Part of the Beryl species of gemstones, emeralds are graded a seven on the Mohs hardness scale, which is three points below a diamond. Because of this, emeralds are soft. They are most commonly found in rectangular shapes, and are the official birthstone of May. These precious stones are commonly sourced from Africa, South America, and Asia.


Rubies often command the highest price per carat of any other gemstone. Part of the corundum species, most rubies are vibrant in red color, and are a 9 on Mohs hardness scale. Since it is only one point below a diamond, rubies are suitable for everyday wear. The ruby is the official birthstone of July.


Diverse in color, sapphires can be found in pink, purple, yellow, green, and more. Blue is the most popular of all sapphire colors. Part of the corundum species, the sapphire is a 9 on the Mohs hardness scale — the same as a ruby. Because of this, sapphires are perfect for everyday wear. They are the official birthstone of September.

Determining Gemstone Quality

Beautiful gemstones have to be properly vetted to determine their value. At Brown and Co. Jewelers, our certified gemologists determine each gemstone’s quality by examining factors such as rarity and durability. Then, based on those characteristics, our team combines their in-depth knowledge to help you pair a unique gemstone with the perfect style of jewelry.

It’s important that your jeweler be a trusted source of knowledge on rare gemstones. So, before you start shopping, be sure to pay Brown and Company a visit. Our professional gemologists on staff are here to help you find the best authentic gemstone for your look.

If you have further questions on rare gemstones or are interested in browsing our selection, visit your preferred Brown and Company location to talk to one of our certified gemologists.

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