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January Birthstones

If you were born in the month of January, you really have only one choice in birthstones - garnet. However, the garnet family is incredibly diverse, encompassing an amazing range of colors. Although the color red occurs most frequently, there are also garnets showing different shades of green, pale to bright yellow, fiery orange and fine earthy shades. The only garnet color that is rarely seen is blue, though some blue garnets have recently been discovered in Madagascar.

January Birthstones - Garnet gems
January Birthstones - Garnet gems

All of the garnets have excellent gemstone characteristics. They have very good hardness, with a rating of 7 to 7.5 on the Mohs scale. They are also very brilliant gems, with a refractive index about the same as sapphire and ruby. Additionally, garnet is one of the few gemstone varieties that is never treated in any way. So garnet buyers can be sure to get a completely natural gemstone.

There are in fact eight different varieties of garnet available on the market, ranging from the inexpensive pyrope and almandite to the exclusive tsavorite and demantoid. All of these garnet varieties have a similar crystal structure, but they vary slightly in their chemical composition. Here is a brief tour of your choices in garnet for your January birthstone.

Pyrope garnet

Pyrope Garnet Gemstones

The classic inexpensive red garnet, frequently with a brown or orange tint. Large stones tend to be very dark and the best color is found in the smaller sizes.
Almandine Garnet

Almandine Garnet Gemstones

Another deep red inexpensive garnet, often with a slight violet tint. A pure deep red is the most desirable color.
Rhodolite Garnet

Rhodolite Garnet Gemstones

A very attractive violet-red, with a lighter tone than pyrope and almandine. More expensive than the dark red garnets, but not as pricey as spessartite, tsavorite or demantoid.
Hessonite Garnet

Hessonite Garnet Gemstones

A brown-red variety of garnet often known as cinnamon stone. Colored by traces of manganese and iron, hessonite is one of the nine planetary gems in the Vedic tradition.
Spessartite Garnet

Spessartite Garnet Gemstones

An orange to red-orange garnet variety with exceptional brilliance. The best specimens have a mandarin orange hue and are popular for high-end jewelry.
Grossularite Garnet

Grossularite Garnet Gemstones

A garnet variety that includes hessonite and tsavorite. The ordinary grossularites are an attractive yellow to golden green.
Tsavorite Garnet

Tsavorite Garnet Gemstones

One of the rarest garnets, tsavorite, is pale to emerald green and is colored by traces of chromium and vanadium. The finest examples rival fine emerald in color, but are superior to emerald in hardness and brilliance.
Demantoid Garnet

Demantoid Garnet Gemstones

The rarest and most valuable of all the garnets. The name demantoid means "diamond-like luster" and demantoid garnet is one of the few gemstones with a luster and brilliance similar to diamond. Found in green to emerald green, demantoid garnet is very rare and is typically found only in small sizes.

  • First Published: November-26-2008
  • Last Updated: January-23-2019
  • © 2005-2019 all rights reserved.
    Reproduction (text or graphics) without the express written consent of (SETT Company Ltd.) is strictly prohibited.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

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