Top 10 Investment Gems

Gemstone investing is not for everyone. But for those who love fine gemstones and beautiful jewelry, rare gems have a good history of increasing in value over time. When the stock market is declining and currency is losing value, gemstones tend to be a reliable store of value that is also compact, portable and private.

Though gemstones are not as liquid as gold, a high quality Burmese ruby or Ceylon sapphire will always retain its value. New discoveries, like the valuable neon spinel discovered in Mahenge, Tanzania in 2007, provide new opportunities for collectors. But in general, the world demand for fine gemstones far exceeds the supply, and gemstone prices mainly move upward over time.

Any high quality gem may be worthy of investment. But based on our years in the trade, here is our list of the top 10 investment gems.

 

1. Ruby

Burma Ruby

 Fine ruby is the rarest of all colored gems, and Burmese ruby has long been the premier investment gem. Fine unheated Burmese rubies in larger sizes draw prices as high as $300,000 to $400,000 a carat at auction. Vivid red -- a color known in the trade as pigeon's blood -- is the most valuable color. Rubies tend to have inclusions, so color is more important than perfect clarity.

Burma rubies are by far the most valuable, but fine unheated rubies from other locations -- Madagascar, Mozambique and Tanzania -- are rapidly increasing in value.

 

2. Blue Sapphire

Natural Blue Sapphire

Based on sales from the top auction houses, blue sapphire is the second most popular colored stone for investment.

The rarest sapphires are from Kashmir, but no new material has been mined there in more than 100 years. Next most valuable is Burma sapphire, followed by Ceylon and Madagascar. Fancy color sapphires -- yellow, pink and padpardascha -- are now popular with investors as well.

 

3. Emerald

Natural Emerald

The emerald market has seen some turmoil as a result of controversies over treatments with artificial resins, but fine untreated emeralds continue to be reliable investments.

Colombian, especially in large sizes, continue to be the most valuable, followed by the top Brazilian emeralds. Some high quality emeralds are also mined in Zambia. Investment grade emeralds must be untreated.

 

4. Spinel

Mahenge Spinel

Spinel is a relative newcomer as an investment gem, but in fact some of the most famous rubies in the world, such as the the Black Prince's ruby in the British Crown Jewels, are actually spinels.

The most valuable spinel colors are red, hot pink and flame orange. Red Burmese spinels and the neon pink-red spinels from Mahenge, Tanzania have the best investment potential. Spinel is completely untreated and prices on fine pieces have risen significantly in the last 5 years.

 

5. Tsavorite Garnet

Tsavorite Garnet

Tsavorite Garnet is a rare gem from East Africa that has begun to challenge emerald as the finest of the green gemstones. Unlike emerald, tsavorite is always untreated, and it has more brilliance than emerald due to its higher refractive index. 

Tsavorite over 2 carats are very rare, and fine stones over 4 carats count as exceptionally rare. Colors range from mint green to a deep chrome green.

 

6. Spessartite Garnet

Natural Spessartite Garnet

Spessartite Garnet is a bright orange garnet colored by manganese. The finest examples, often referred to as Mandarin Garnet in the trade, are a pure orange that is one of the most vivid colors in the gemstone world. 

The pure orange specimens are very rare, and come mainly from Africa, particularly Nigeria and Namibia. Large clean stones are quite valuable and display remarkable brilliance.

 

7. Alexandrite

Natural Alexandrite

Alexandrite is a rare chrysoberyl that is popular with collectors for its striking color change and excellent hardness (8.5 on the Mohs scale). 

Alexandrite was first discovered in Russia and Russian specimens are very rare and valuable. Today the highest quality alexandrite comes from Brazil, with medium grade material from Tanzania.

 

8. Jadeite Jade

Burmese Jadeite Jade

Fine translucent emerald-green jadeite is known as Imperial Jade. This rare gem is found only in Burma (Myanmar) and is coveted by collectors around the world, especially in Asia.

Type A jadeite is untreated natural Burmese jadeite where the color is 100% natural. Only certified jadeite of this quality is deemed worthy of investment.

 

9. Imperial Topaz

Natural Imperial Topaz

The Ouro PrĂȘto area in Minas Gerais is the source of the rarest topaz known as imperial topaz. This topaz is golden-orange to orange to pink, pinkish-red or violet in color.

The color should be completely natural, with no enhancement by heat or other methods. Stones with a hint of pink or red are the most valuable, with a pure red natural topaz counting as extraordinary.

 

10. Paraiba Tourmaline

Natural Paraiba Tourmaline

Paraiba tourmaline is a rare copper-bearing variety of tourmaline with a distinctive neon-like glow. It was first discovered in the Brazilian state of Paraiba in 1989. Since then small deposits have been found in Nigeria and Mozambique

The Brazilian paraiba is still the most valuable, but color and clarity are more important than origin for these rare gems. Clean paraiba tourmalines with exceptionally vivid color are the most valuable.

 

These are not the only investment grade gem varieties, by any means. Top specimens of nearly every gem type are collectible. But the harder and most beautiful gems tend to do best as investments. In addition to the 10 varieties listed above, we would also mention Tanzanite, Demantoid Garnet, Aquamarine and Rubellite Tourmaline.

When buying gemstones for investment purposes, it is critical to buy top grade gems. Low cost commercial grade stones are essentially worthless: they suffer from mediocre color or clarity, and are typically poorly cut, lacking brilliance and fire. Fine gemstones are distinguished by vivid, intense color, outstanding clarity, and excellent cut. Buy the best you can afford, always keeping in mind that this is money not spent, but rather invested.

 

 
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