Why do they heat treat sapphires?

Are heat treated sapphires valuable?

Heating is an accepted treatment for sapphire. But for fine-quality sapphire, confirmation from an independent laboratory like GIA that there is no evidence of heat adds to a sapphire’s rarity and value.

What does it mean when a sapphire has been heated?

Natural Heated Sapphires

These are natural blue sapphires that are heated in industry-accepted temperatures to enhance the intensity of the blue color and their clarity. This is a standard, legal, and stable process that does not impact the longevity or durability of the sapphire.

What is the difference between heated and unheated sapphires?

By appearance, is there a difference between natural and heat-treated sapphires? Yes, but to a trained eye. Generally speaking, natural no-heat sapphires will have a softer luster and smoother surface appeal. Heated sapphires display a glass-like surface that feels hard and unnatural.

Are heat treated gems less valuable?

We attempt to let you know when a gem is treated. Heat treatment is the most common treatment and without heat treatment the availability of fine gems would be significantly less. With less gems prices would be dramatically higher only available to the rich.

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What is unheated blue sapphire?

Unheated sapphires mean the sapphire is natural and it has not been enhanced by any form of heat treatment or any other treatment.

What is an untreated sapphire?

In very short detail, an untreated sapphire is one that has been taken from the ground and then faceted. Nothing at all was done to the stone to alter the natural beauty, which only elements and process in the earth created naturally. These sapphires are exceptionally more rare and valuable.

What percentage of sapphires are heat treated?

If a gemstone has been heat treated, it simply means it has undergone some type of thermal process in order to alter or improve its appearance. In this modern era, nearly 95 percent of sapphire gemstones are heat-treated for several important reasons.

Why are gemstones heat treated?

Heat Treatment is a gemstone’s exposure to high temperatures that alters the color and increases the clarity. Specifically, heating is used to lighten, darken or enrich the color. Without heat treated gemstones, fine gems’ availability in the most desirable colors would be scarce.

How can you tell if its a real sapphire?

To identify if the sapphire is real, stay in total darkness and use a flashlight to test it. If the stone is genuine, light of the same color as the sapphire is reflected. If it is a fake sapphire jewel (usually made of glass) you will be able to see other colors in the crystal.

Are diffused sapphires worth anything?

The price between each level of treatment can range from. The exceptionally expensive US$5,000 per carat for unheated natural sapphires. To US$1 per carat for the new treatment lattice-diffused sapphires which has now flooded the market today.

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When did they start heat treating sapphires?

The first stones heated allegedly originated from the Pailin mines in Cambodia. Treated sapphire rough was given for cutting to lapidaries in the Jura Mountains of Europe at least by 1920 (and possibly as early as 1915).

What are Montana sapphires worth?

Typical Montana sapphire can cost anywhere from $250-$1500 per carat for under 1/2ct to upwards of $7000 per carat for larger than 5 carats. Price is dependent on the quality of the gemstone (ie color, clarity, cut, and carat).

Are sapphires Rare?

Sapphires of fine quality are in fact very rare. Diamonds, for example, are in almost every type of jewelry, in every jewelry store, and on websites around the world. The world production and use of diamonds proves that diamonds are not at all rare, and in fact are in extraordinary supply.

Do sapphires fade?

Sapphire Colors That Fade

The only colors of sapphires that are known to have a fading color property are yellow and padparadscha sapphires. … They exhibit this unique color fading and reviving characteristic as a feature of the stone’s natural design. These sapphires are similar to plants.