The highest prices are charged for the more saturated colors, with the rare Santa Maria aquamarines in fine quality commanding prices over $1,000 per carat. Prices for larger aquamarines range from about $300 to $600 per carat. Larger stones tend to have deeper color due to the longer light path, and you will find the prices for top colors to be considerably higher due to a premium for both color and size. It is unusual to find the deeper blues in aquamarines under 5 carats. The greenish-blue stones will usually be priced at the lower end of the range, unless the color saturation is particularly good. Smaller aquamarines (under 5 carats) of good quality can be found at prices around $100 to $250 per carat. Darker-toned aquamarines usually command the highest prices in the market. Green aquas are often heated to reduce the yellow, so a clean unheated blue aquamarine with good color saturation is a rare and valuable gem.Īll aquamarines are pastel in color, but some of the lower-priced gems are quite pale. Aquas can rangle in color from blue to green, but the pure blues are the more valuable. The main price differentiators are color and carat weight. Most high quality aquamarines are graded "loupe clean" or "almost loupe clean," meaning that any inclusions are not visible with the naked eye. Because of aquamarine's transparency and light color, inclusions tend to be highly visible and can impair the beauty of the gem. Most of the aquamarine cut as fine gemstones is very clean material, so you will find that most of the high quality aquas offered in the market have excellent clarity grades. But in the case of aquamarine, color is especially important. Like all gemstones, the "four C's" - color, clarity, carat weight and cut - affect price and value. Prices on aquamarines can vary widely, so it is important to understand the quality factors that affect price. It is also one of the few fine gemstones that can be found in large sizes at affordable prices.
It is valued for its excellent hardness (7.5 to 8 on the Mohs scale) and its delicate color and excellent transparency. Aquamarine, the blue or greenish-blue color of the mineral beryl, is one of the most popular of colored gemstones.
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