One spectacular thing about many precious stones is that, the world's demand for fine gemstones far exceeds the supply, and gemstone prices mainly move upward over time. Yes, any high quality gem may be worthy of investment.
Here are five precious stones one can invest in apart from Gold and Silver.
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 U.S Dollars to 400,000 U.S Dollars 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:
According to a firm, 'Based on sales from the top auction houses, blue sapphire is the second most popular colored stone for investment.'
The rarest sapphires are from what is known as 'Kashmir', but no new material has been mined there in more than 100 years.
As a result of controversies over treatments with artificial resins, Tyhe emerald market has seen some turmoil. However, 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.
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:
In case you don't know, the 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.
So, here we are. Though there are lots of precious stones available, a professional gemstones firm rated the above higher. Do your research, and invest accordingly.