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1.43 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gems, 8.1 x 6.1 mm, Photo A

1.43 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gems, 8.1 x 6.1 mm

Opal

1.43ct total2 pcs
$ 47.19
8.1 x 6.1 mm
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1.4 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5 mm, Photo A

1.4 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5 mm

Hessonite Garnet

1.40ct1 pc
$ 27.72
6.9 x 5 mm
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16.93 ct Yellow Quartz, 18 x 17.8 mm Octagon Concave Cut From Brazil, Photo A

16.93 ct Yellow Quartz, 18 x 17.8 mm Octagon Concave Cut From Brazil

Quartz

16.93ct1 pc
$ 93.12
18 x 17.8 mm
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16.31 ct Yellow Quartz, 15.9 x 15.8 mm Asscher Cut From Brazil, Photo A
Click for Product Video (394847)

16.31 ct Yellow Quartz, 15.9 x 15.8 mm Asscher Cut From Brazil

Quartz

16.31ct1 pc
$ 89.71
15.9 x 15.8 mm
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1.6 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.1 x 3.5 mm, Photo A

1.6 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.1 x 3.5 mm

Tourmaline

1.60ct1 pc
$ 35.11
16.1 x 3.5 mm
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0.51 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 4.9 x 4.1 mm, Photo A

0.51 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 4.9 x 4.1 mm

Sapphire

0.51ct1 pc
$ 116.61
4.9 x 4.1 mm
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6.63 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.2 mm, Photo A

6.63 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.2 mm

Zircon

6.63ct total5 pcs
$ 65.34
7.1 x 5.2 mm
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1.13 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.1 x 5 mm, Photo A
Click for Product Video (567387)

1.13 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.1 x 5 mm

Ruby

1.13ct1 pc
$ 870.10
7.1 x 5 mm
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17.82 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 25.8 x 16.7 mm, Photo A

17.82 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 25.8 x 16.7 mm

Ammolite

17.82ct1 pc
$ 356.40
25.8 x 16.7 mm
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2 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gems, 5.2 x 4.2 mm, Photo A

2 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gems, 5.2 x 4.2 mm

Sapphire

2.00ct total4 pcs
$ 211.80
5.2 x 4.2 mm
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27.67 ct Cushion Peanut Wood, 26 x 22.5 mm From Australia, Photo A

27.67 ct Cushion Peanut Wood, 26 x 22.5 mm From Australia

Peanut Wood

27.67ct1 pc
$ 16.60
26 x 22.5 mm
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0.6 ct Loose Yellow Sapphire, 4.6 x 4.5 mm Cushion Cut From Tanzania, Photo A

0.6 ct Loose Yellow Sapphire, 4.6 x 4.5 mm Cushion Cut From Tanzania

Sapphire

0.60ct1 pc
$ 32.73
4.6 x 4.5 mm
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18.93 ct Oval Larimar, 21 x 16.3 mm From the Dominican Republic, Photo A

18.93 ct Oval Larimar, 21 x 16.3 mm From the Dominican Republic

Larimar

18.93ct1 pc
$ 46.02
21 x 16.3 mm
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0.9 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 5.1 x 5.1 mm, Photo A

0.9 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 5.1 x 5.1 mm

Hessonite Garnet

0.90ct1 pc
$ 17.82
5.1 x 5.1 mm
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1.33 ct Marquise Checkerboard Peridot, 7.9 x 4.1 mm From China, Photo A

1.33 ct Marquise Checkerboard Peridot, 7.9 x 4.1 mm From China

Peridot

1.33ct total2 pcs
$ 10.64
7.9 x 4.1 mm
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4.35 ct Green Apatite, 9.1 x 9 mm Asscher Cut From Madagascar, Photo A

4.35 ct Green Apatite, 9.1 x 9 mm Asscher Cut From Madagascar

Apatite

4.35ct1 pc
$ 208.36
9.1 x 9 mm
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1.3 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 5.9 x 3.9 mm, Photo A
Click for Product Video (469033)

1.3 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 5.9 x 3.9 mm

Tsavorite Garnet

1.30ct total3 pcs
$ 316.04
5.9 x 3.9 mm
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50.6 carat Uvarovite Garnet Drusy, loose Certified Uvarovite Garnet Drusy from Russia, Natural Untreated Gem, 41.3 x 22.3 mm, Photo A

50.6 carat Uvarovite Garnet Drusy, loose Certified Uvarovite Garnet Drusy from Russia, Natural Untreated Gem, 41.3 x 22.3 mm

Uvarovite Garnet Drusy

50.60ct1 pc
$ 75.90
41.3 x 22.3 mm
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0.38 ct Pink Spinel, 4.4 x 4.2 mm Cushion Cut From Tanzania, Photo A

0.38 ct Pink Spinel, 4.4 x 4.2 mm Cushion Cut From Tanzania

Spinel

0.38ct1 pc
$ 26.60
4.4 x 4.2 mm
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5.61 carat Round Cabochon Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.1 mm, Photo A

5.61 carat Round Cabochon Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.1 mm

Amethyst

5.61ct1 pc
$ 28.05
11.1 mm
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22.21 ct Green Aventurine, 24.6 x 19.1 mm Oval Cut From Brazil, Photo A

22.21 ct Green Aventurine, 24.6 x 19.1 mm Oval Cut From Brazil

Aventurine

22.21ct1 pc
$ 22.21
24.6 x 19.1 mm
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1.56 carat Cushion Checkerboard Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.2 x 5.1 mm, Photo A

1.56 carat Cushion Checkerboard Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.2 x 5.1 mm

Amethyst

1.56ct total2 pcs
$ 10.92
7.2 x 5.1 mm
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8.48 ct Cushion Pietersite, 16.1 x 10.5 mm From Namibia, Photo A

8.48 ct Cushion Pietersite, 16.1 x 10.5 mm From Namibia

Pietersite

8.48ct1 pc
$ 20.86
16.1 x 10.5 mm
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1.61 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 5.1 mm, Photo A

1.61 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 5.1 mm

Topaz

1.61ct total2 pcs
$ 12.40
6.9 x 5.1 mm
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11.06 ct Oval Rutile Quartz, 20.2 x 11.6 mm From India, Photo A

11.06 ct Oval Rutile Quartz, 20.2 x 11.6 mm From India

Rutile Quartz

11.06ct1 pc
$ 30.42
20.2 x 11.6 mm
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3.04 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 4.9 mm, Photo A

3.04 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 4.9 mm

Topaz

3.04ct total4 pcs
$ 23.41
6.9 x 4.9 mm
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2.15 carat Sky Blue Topaz,  loose Topaz from Brazil, Natural Gems, 7.1 x 5 mm, Photo A

2.15 carat Sky Blue Topaz, loose Topaz from Brazil, Natural Gems, 7.1 x 5 mm

Topaz

2.15ct total2 pcs
$ 11.83
7.1 x 5 mm
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4.46 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13 x 9 mm, Photo A

4.46 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13 x 9 mm

Citrine

4.46ct1 pc
$ 27.13
13 x 9 mm
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58.04 ct Baguette Charoite, 44.6 x 19 mm From Russia, Photo A

58.04 ct Baguette Charoite, 44.6 x 19 mm From Russia

Charoite

58.04ct1 pc
$ 95.77
44.6 x 19 mm
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6.42 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 17.3 x 9.4 mm, Photo A

6.42 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 17.3 x 9.4 mm

Pietersite

6.42ct1 pc
$ 15.79
17.3 x 9.4 mm
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10.22 carat Pear Rainbow Moonstone, loose Certified Rainbow Moonstone from the United States, Natural Untreated Gem, 17 x 11.7 mm, Photo A

10.22 carat Pear Rainbow Moonstone, loose Certified Rainbow Moonstone from the United States, Natural Untreated Gem, 17 x 11.7 mm

Rainbow Moonstone

10.22ct1 pc
$ 183.96
17 x 11.7 mm
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0.88 ct Loose Orange Sapphire, 5.4 mm Round Cut From Tanzania, Photo A

0.88 ct Loose Orange Sapphire, 5.4 mm Round Cut From Tanzania

Sapphire

0.88ct1 pc
$ 58.12
5.4 mm
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Photos are of Actual Products for Sale

What is a Star Gemstone?

Star or, more properly, asterism, is a term used for gemstones which display a star-like shape that can appear to float across their surface. Typically the star will have 4 or 6 rays but on very rare occasions 12 rays can be seen.

The most famous Star Gemstones are rubies and sapphires but asterism may also be exhibited by a number of other gemstones, such as moonstone, lemon and rose quartz, garnet and diopside.

In most cases, the 'star effect' is the result of tiny inclusions of the mineral rutile within the gemstone which are aligned in parallel lines. With great skill, cutters have to turn the gemstones to just the right angle before shaping and polishing to ensure they have a clear and distinct star.

What shape are Star Gemstones?

To display the star effect at its most impressive, most Star Gemstones are cut into cabochons - flat bottoms with smooth domed tops - not faceted. These cabochons tend to be round or oval but very rarely come in pear or rectangular shapes.

What are the spiritual benefits of Star Gemstone?

With their other worldly appearance, it is no wonder that Star Gemstones were quickly given mystical powers in the ancient world.

In India, a Star Ruby would be worn into battle by warriors for protection and it was believed that any opponent who saw the gemstone would lose half his bravery.

It has also been a long held belief that Star Gemstones could ward off the malevolence and misfortune brought about by the Evil Eye.

The three lines that create the 6 rayed Star Gemstones are supposed to symbolize trust, hope and destiny.

Each gemstone type - ruby, sapphire, garnet and so on - has its own strengths and spiritual influences but these powers are magnified and intensified by the Star.

See our detailed article on gemstone meaning and uses

What color are Star Gemstones?

Generally the ideal color of a Star Gemstone should be close to that of a normal specimen of the gem type. So, for example, a star sapphire should be blue, a star ruby should be red and a star rose quartz should be pink.

Of course, there will be variations - star sapphires can be found in yellow and golden colors, star rubies range from pink to purple and the presence of the rutile needed to create the star effect will naturally weaken the color of all star gemstones.

Read more about gemstones colors here

How much are Star Gemstones?

Usually gemstones are priced according to the 4 Cs - color, clarity, cut and carat weight - and the gem type. Star gemstones are no different but have a couple of extra elements that add or subtract value.

As an example, in most cases, rare star sapphires will be more expensive than relatively common star moonstones. Star Quartz and Star Garnets are both very reasonably priced gemstones.

Once you have established which gem type to choose there are a few factors to consider when pricing the gemstone:

  • Color - a vivid, even color is preferred - similar to typical gem type color.
  • Clarity - the rutile inclusions mean that Star Gemstones will be semi-transparent or translucent at best.
  • Cut - Star gemstones tend to be oval or round cabochons in order to show off the star effect.
  • Carat - All other factors being equal, the larger the carat weight the more valuable the gemstone.
  • Star - the star itself should be sharp and distinct, centered at the top of the stone, and easily visible from all angles and from a fair distance. The rays, whether 4, 6 or 12, should be straight, unbroken and the same width and length. The star should also have a good contrast against the colored background. Finally the star should have a smooth and graceful movement across the face of the gemstone as it is turned from side to side.

Are there any famous Star Gemstones?

Yes, some of the most famous and infamous gemstones in history have been Star Gemstones:

  • The Neelanjali Star Ruby - A 12 point double star weighing 1370 carats.
  • Black Star of Queensland - world's largest gem-quality star sapphire, it weighs 733 carats.
  • The Star of Asia - A famous milky blue 330 carat Burmese sapphire beauty.
  • The Midnight Star Sapphire - a 116 carat deep purple Sri Lankan sapphire.
  • The Star of India - A flawless 563 carat blue star sapphire with a star on both sides.

What jewelry are Star Gemstones suitable for?

Large single star gemstones can be ideal for pendants and radiate both alluring and mystical qualities. Slightly smaller star gemstones can make great rings with a very popular retro look.

Although many Star Gemstones have unique looks, it is possible to find some examples as pairs and in lots, so earrings, multi-stone jewelry items as well as side stones and accent stones become options.

Gemstones can vary in hardness and durability. Some Star Gemstones such as rubies and sapphires are very tough and can be used for all types of jewelry, others such as garnet and quartz are a little softer but still sturdy enough for daily use.

As a guideline gemstones of a Mohs Hardness rating of above 7 are considered durable.

For more information see our article here.

Star Gemstone History

Star Gemstones have a long and varied history full of myth and legend.

Owner of the 'face that launched a 1000 ships', renowned beauty Helen of Troy supposedly owed her desirability to the large star sapphire she wore. Dozens of princes fought for her hand before she married King Menelaus of Sparta. Then she ran away with Paris and began the ten year Trojan Wars.

Wise King Soloman had a magical ring which was described as blue sapphire with a 6 pointed star of David engraved on it that allowed him to speak to animals and banish demons. Sounds like it could have been a Star Sapphire.

In the 'jewel heist of the century', the Star of India and the Midnight Star Sapphire were among the gemstones stolen back in 1964 valued at the time at $400,000 (much more now). Luckily most of the stones were recovered.

Read more about the famous heist here.

Star Gemstone Treatments

A common way to enhance the appearance of gemstones is through heat treatment as this can improve both the color and the clarity. With Star Gemstones it can be a little tricky to improve the color with heat and not destroy the inclusions that create the star effect.

For this reason most Star Gemstones are not treated.

Some star sapphires and star rubies are fracture filled which repairs minor cracks and fissures common in these gemstones. This is a permanent and accepted treatment.

Synthetic Star Gemstones exist although GemSelect never buys or sells them. Look out for any gemstones that look 'too perfect' and purchase your stone from a reputable dealer.

Any treatments our gemstones receive will be fully and clearly disclosed.

Star Gemstone Product Uses

Star gemstones can be used in just the same way as all gemstones - for jewelry items, spiritual crystal healing, to decorate the home or office or to expand a collection.

Read All

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