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Garnets are a set of closely related minerals forming a group, with gemstones in almost every color.

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The best colors for spessartine are vivid orange to orangy red.

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No eye visible inclusions present is rare for spessartine.

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The intense color, lack of inclusions and skillful cutting create a bright stone.

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This specimen is hessonite garnet also called the cinnamon stone for its color.

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Array of faces

An amazing intergrowth of hessonite garnet crystals creates an array of crystal faces.

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Mineral Specimen

Hessonite garnet specimens are attractive and collectible.

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About Garnet

About Garnet

Red garnets have a long history, but modern gem buyers can pick from a rich palette of garnet colors: greens, oranges, pinkish oranges, deeply saturated purplish reds, and even some blues. Red garnet is one of the most common and widespread of gems. But not all garnets are as abundant as the red ones. A green garnet, tsavorite, is rarer and needs rarer rock chemistries and conditions to form.

Garnet Description

Garnet History and Lore

Birthstones & Anniversaries

Garnet is the birthstone for January and the gem for the second anniversary.

Tsavo Park

Campbell Bridges mined tsavorite garnet in Kenya near Tsavo National Park.


The imperial Russian jeweler created intricate jewelry designs for demantoid garnet.

3800 BC

A stylish red garnet bead necklace found in a grave in Egypt is more than 5,000 years old.


  • Mineral: Garnet group
  • Chemistry:
  • Almandine- Fe3Al2(SiO4)3
  • Andradite- Ca3Fe2(SiO4)3
  • Grossular- Ca3Al2(SiO4)3
  • Pyrope- Mg3Al2(SiO4)3
  • Rhodolite- (Mg, Fe)3Al2(SiO4)3
  • Spessartine- Mn3Al2(SiO4)3
  • Color: All colors
  • Refractive index: 1.714-1.888
  • Birefringence: None
  • Specific gravity: 3.47-4.15
  • Mohs harness: 6.5-7.5


There are a number of processes used to alter the color, apparent clarity, or improve the durability of gems.

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Some gemstones have synthetic counterparts that have essentially the same chemical, physical, and optical properties, but are grown by man in a laboratory.

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Any gem can be imitated—sometimes by manmade materials or by natural materials chosen by man to impersonate a particular gem.

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gem love

Why We Love This Gemstone

Gemological Challenge

Figuring out how each new gem garnet fits into the six main mineral species is a challenge for gemologists.

Horsetail Inclusions

Horsetail inclusions in green demantoid garnet are one of the few internal features that increase a gem's value.


Due to demantoid garnet's high dispersion, well-cut, fashioned gems display an amazing amount of fire.

Quality Factors

When deciding which garnet to buy, think of garnets in terms of color.


quality factors

Garnet includes affordable dark red varieties, rare and valuable greens, and many colors in between.


quality factors

Garnet clarity often depends on garnet type. Red garnets often don’t have eye-visible inclusions.


quality factors

Many garnets are cut into standard shapes and calibrated sizes to allow setting into manufactured jewelry.

Carat Weight

quality factors

Garnets can be found in all sizes and weights, although some varieties are rare in large sizes.

Garnet Quality Factors: The Comprehensive Guide


Explore sources, gemological research, and the role of gems in history.

A selection of demantoid from Namibia’s Green Dragon mine.

Large Namibian Demantoid Garnet

Duncan Pay , Jul 31, 2015 Read Article
Purple pyrope-almandine garnets from Manica Province, Mozambique

Purple Pyrope-Almandine Garnet From Mozambique

Supharart Sangsawong, Victoria Raynaud, and Vincent Pardieu , Nov 7, 2016 Read Article
New tsavorite production from Scorpion mine

Update on the Scorpion Tsavorite Mine

Tao Hsu and Andrew Lucas , Apr 28, 2016 Read Article
IMG - WN15 GG Cover 193763 300x169

Vanadium and Chromium-Bearing Pink Pyrope Garnet: Characterization and Quantitative Colorimetric Analysis

Ziyin Sun, Aaron C. Palke, and Nathan Renfro , Feb 1, 2016 Read Article