Without a doubt, the best and most sought after ruby in the world by collectors is mined in Mogok, Burma (now Myanmar). The reason these gems are coveted is that they glow and tend to look good in all lighting conditions. This glow is the direct result of fluorescence. When fluorescent gems are struck with ultraviolet light, the gem adds an extra punch. Burma stones tend to be light and bright compared to ruby from other sources.
Although there are thousands of different shades of red, for the sake of argument, let's categorize Mogok Burma ruby into three groups:
For a more detailed explanation, read here: Gemstone Forecaster, Fall, 1999.
Which color is best for collectors? This is a controversial subject among dealers and collectors. Some collectors love strictly one group, for example the "pigeon blood" reds, to the exclusion of the other groups. Some collectors strictly collect the pinks or magentas. Some collectors believe it is too difficult to trade in only one group and collect the finest examples of all three groups. This is probably the most prudent strategy. For collectors on a budget, you can start with the hot pinks and work your way up through the magentas to the reds as your finances allow.
The finest one carat, unheated, Mogok Burma rubies cost between $5000-$30,000 per carat. Two carat Mogok Burmas are available from $10,000-$60,000, three carats between $30,000-$85,000 per carat. Four carat Mogok Burmas can easily exceed $100,000 per carat. Larger gem quality Mogok Burma rubies can reach hundreds of thousands to over one million dollars per carat. (THESE BURMA RUBY PRICES UPDATED 2017)
Ever since Burma's Communist leaders shut off the country in 1962, Mogok Burma ruby has been an endangered species. Even before 1962, the famous Mogok tract production was in sharp decline. Mogok is 4,000 feet above sea level and frequently has over 100 inches of rain a year. It has been worked since 1200 A.D. Gem poachers worked this area by night. There is some limited production today due to the Burmese leaders present strategy of attempting to "open the country and acquire hard currency". However, the Burmese government is well known for constantly changing their economic policies.
Today most miners have left Mogok and are working a new find in Mong Hsu (pronounced "Mine Shu"). This mine was discovered in 1991 and the gems hit the US market in 1993. The mine is located 60 miles south of Mogok and sits in rebel territory. The Shans, an ethnic tribe at war with the Burmese Central government, control this area. Nevertheless, the Burmese government has auctioned off the land for mining and is even involved in a few joint ventures. Although the vast majority of the ruby production is rejection grade, it has been estimated that enough ruby has been mined to produce sales between $100-$200 million. Most of the goods are smuggled across the Thailand border at Mai-Sai or Mae-Sat. Then they are sent to Chantaburi, Thailand for heat treatment. Rough Mong Hsu tends to have a color-darkening blue hexagonal zone that runs through the center of the stone and looks like "bad garnet". After cooking, the stones turn into bright, lively red gems. As a matter of fact, most of this production looks exactly alike in color and tone. The largest Mong Hsu known is an eight carat gem that was rumored as being offered for $50,000 per carat. As a general rule, they sell in price similar to Thai ruby. Recent mining history indicates this find may be small and short-lived. The Mong Hsu material is presently involved in a controversy. We have always known this stone was heat treated. The American Gemological Laboratories (AGL) contends 70% of these rubies are also fracture-filled with intent to deceive dealers, jewelers, and the final consumers. The Gemological Institute of America (GIA) says they are not fracture-filled. Therefore, the prudent course at this stage is to only collect Mogok Burma ruby, not Mong Hsu. However, Mong Hsu ruby may hold a special place in certain portfolios and in jewelry if you want a red stone but do not have the funds for a Mogok.
Due to the severe shortages in Burma production, the majority of rubies bought and sold today are from Thailand. A few Thai families firmly control every aspect of marketing; from mining to cutting and heating. If you are looking to collect a ruby on a relatively moderate budget, many experts predict this stone may, in the long term, eventually gain the acceptance Burma ruby now holds. Almost all of these stones are cooked. The majority of Thai stones tend to have purple secondary colors as compared to Burmas. Occasionally, you can find an intense red/orange that is highly desirable. Also, you sometimes find a Thai ruby with a lighter tone similar to Burma, (like those from the now defunct Bo Rai mine) that is highly desirable. Some Thai rubies approach Burma in appearance and are highly sought after. As a general rule, one carat Thai stones will sell between $1000-$7500 per carat. Two carat stones can range between $3500-$15,000. Three carat Thai ruby can cost between $4500-$20,000 per carat. Four carat or larger Thai stones can exceed $20,000 per carat.
Another interesting ruby worth noting is the star ruby. Rather than being faceted like most ruby, these stones are cut cabochon. Until recently, these stones always sold for more than the faceted ruby. In the late 19th century, three carat star rubies went for $3000 per carat. Stones found today that could be cut into stars are routinely heated to dissolve the rutile and then faceted. Therefore, fine stars are rarer than rare. Also, US buyers must compete with the Japanese and the Europeans who will pay any price for these gems. Star rubies were the rage until the 1960s, but have since fell out of favor. If you want to see an outstanding collection of stars, go to the American Museum of Natural History in New York and view the J.P. Morgan collection. In searching for these gems, follow these guidelines:
Today, Kashmir sapphires remain at the top of the gemstone hierarchy. The blue they possess is rich, velvety, and serenely soft. Originally discovered in 1882, the stones were so plentiful the locals would use them as flint stones. By 1925, the mines were nearly depleted. Kashmir is a mountainous region in northern India. It is about 86,000 square miles and has a population of over 6 million. Due to its beauty and towering mountain ranges, it is often called the "Switzerland of India". Much of the production today is smuggled out. The region is so inaccessible that it can only be reached by foot or mule. Mining is sporadic and only attempted for a few weeks in the summer. In the winter, temperatures can fall below -45 degrees F, and blizzards can last for weeks. During the Depression, fine Kashmir blues sapphires never sold for more than $500 per carat. These stones are so rare, only a few may be available at any one time. Today, you can easily spend $5000-$10,000 for a carat size gem, $10,000-$15,000 for a two carater. Larger stones can go up to $50,000-$60,000 per carat.
Mogok Burma sapphire is almost as rare as Kashmir sapphire. The production of Burma sapphire is exactly the same situation as Burma ruby (See Ruby Section). As a general rule, you are looking for a milk-of-magnesia electric blue. Deduct 25% off the Kashmir prices to arrive at the price Burmas are trading for. Add 40% for an ultra-rare uncooked gem. Many collectors contend that Burmas will eventually reach price parity with the Kashmir gems, and are buying whatever is available.
A major source for blue sapphire today is Sri Lanka. In the mid-1970s, the Thais experimented in heating these gems to permanently improve their color. Instead of using low temperature, charcoal-fire heat, they bought high-temperature kilns and sophisticated furnaces. This caused the milky yellow rough (called Geuda) to turn blue and it also caused cloudy stones to turn clear. This new technology actually more dramatically assisted commercial-quality blue sapphires than collector sapphires. Today, with the exception of a few fine stones, 99% of all blue sapphire is cooked. This market has actually turned into a two-tiered market; cooked vs. uncooked. Expect to pay about a 30% premium for a non-cooked blue sapphire. As a general guideline, Sri Lanka blue sapphire sells for 1/2 the price of Kashmir stones. The finest one carat Sri Lankan stones can range from $1000-$3000 per carat. Two to five carat sized stones sell between $3000-$7000. Over five carats, stones can reach $10,000 per carat. For moderate budget collectors, stick with the finest blue colors.
There are also new blue sapphire sources in Africa and Laos. Some of these stones rival the Sri Lankan goods. Thailand and Australia also produce blue sapphire, but they are overly dark, and should not be collected. They are simply too abundant.
Finally, like ruby, when some rutile-filled stones are cut cabochon they produce a six-sided star. Regretfully, because the Thai cookers have discovered how to remove the rutile by heating these gems, they are becoming very rare. Also, in the 1940s, Linde, a division of Union Carbide, began manufacturing synthetic star sapphires. Of course the synthetic star's legs were perfect, and consumers began demanding the same from the natural gems. This is really too much to ask from a natural gem. Nevertheless, if you are interested in collecting natural star sapphires, here are some tips: The quality of the star is everything. The star is more important than the color. Grayish sapphires tend to have better stars than the top blues. Gray stones tend to be better cut than the blues. The blues tend to have sagging bellies, while the grays are flatter. This is because the blues are more translucent, and cutters must keep more of the original rough to retain a star. Therefore to collect fine blues, expect to pay for extra weight. However, on the positive side, the consolation is that blues with fine stars are rare, and sought after by collectors worldwide. If one or two of the legs of a star are missing in a 10 carat blue, expect to pay $3000 per carat. If the star is perfect, double this price-if you can find one. Prices ease a little at 5 carats or less. For collectors on a budget, you can buy light blue or gray stars for 1/10 of these prices.
Spinel is probably one of the most misunderstood, yet prized, gems in the marketplace. From the beginning of time, it was assumed all red stones were rubies, from the Latin for red "ruber". In 1783, mineralogist Rome de Lisle discovered there was a gemological difference between ruby and spinel. The famous "Black Prince Ruby" and the "Timur Ruby" in the British State Crown Jewels are actually high quality, and priceless, spinels. In the early 1900s, scientists devised an inexpensive method for creating synthetic spinels, which is why many inexpensive birthstone rings are actually synthetic spinels. The amount of fine spinel in today's market is severely limited. These gems are mined in and around Burma ruby as crystals and pebbles in placer deposits, where they accumulate because they resist weathering. It is amazing how many spinel turn up in ruby shipments at the border. Only knowledgeable experts can discern the difference. These gems are 200 times rarer than ruby, possess more fire (dispersion), and are available for about 25% of the price of rubies. For collectors, stick with gem, blood or day glow reds, hot pinks, and flame oranges. Any spinel over 2 carats is large. Occasionally, one finds a ten carat spinel. Some collectors collect one color, and others collect all the colors. Besides the most common colors, spinel also is discovered in blue, purple, and color-change. Pastel spinel is mined Sri Lanka. These pastel stones are priced in the $50-$500 per carat range. There is also new spinel production from Viet Nam and East Africa. With minor exceptions, these gems are not as intense as the Burma gemstones and should be avoided by collectors.
This beautiful green garnet was discovered in 1968 in the Tsavo National Game Park. When Campbell Bridges discovered the green garnet, he thought he had discovered a new source for demantoid garnet. Demantoid is the only other green garnet (once mined in Russia) and now trades from $10,000 per carat and up. Many experts believe tsavorite will be the next demantoid, extinct and ultra-rare. It is often called the Rolls-Royce of greens at Cadillac prices.
From an collector standpoint, tsavorite is 200 times rarer than emerald, is cleaner, more brilliant, is not altered with with oil or heat. Plus, tsavorite is available for 1/4 of the price of emerald. Today there are four small mines operating in Kenya. Any stone above three carats is considered large and exceedingly rare. Sporadic production probably means higher prices. The tsavorite pockets are small and unpredictable. Only one or two mines can be counted on to be operating. When collecting tsavorite look for a lime Jell-O green. Avoid light soda-bottle green or overly black stones.
TEN RULES FOR GEMSTONE COLLECTING
The following rules are critical if you are going to be a successful collector:
Irrespective of which portfolio theory you believe, the key is to collect gems you love. The buying, the possessing, the occasional viewing of your gems in your safety deposit box at the bank, should give you a feeling that is indescribable. The true goal of collecting is the pride you incur with owning some of the finest gems presently available in the world. Building a collection of fine gems should be fun.
If you buy, sell, and trade properly your gem collection should grow and grow. In a sense, it is almost a forced savings plan, but often viewed by collectors as considerably more fun than looking at a bank savings account balance. As time passes your gem portfolio may grow in value. If economic conditions change and inflation heats up, watch out, your portfolio may be worth a fortune. These two conditions, time and inflation, made Mr. Hancock's $20,000 investment worth $1 million.
However, even if you are not the next Mr. Hancock, the thrill of the chasing fine stones and the thrill of ownership is unparalleled in the collecting arena. The rest is just gravy. Good luck and have fun!