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.
What is a diffused sapphire mean?
Blue diffusion-treated sapphires are be- coming more prevalent than ever before. The diffusion technique, which involves the addition of color-causing chemicnls during heat trentment, results in a thin layer of color at the surface of colorless or light-colored sapphire.
What is a diffusion genuine sapphire?
Lattice diffusion is a treatment process that uses heat and chemicals to diffuse an element into a gemstone to artificially change its color. Lattice diffusion–treated sapphires can be any color. In some cases the added color is shallow. In others, it goes all the way through the stone.
What is a diffused gemstone?
Coloured gemstones have undergone treatment for thousands of years. … Diffusion is a technique whereby certain natural elements, those used in nature when colouring allochromatic gems, are placed on the surface of the gem during the heating process and the colour is diffused into the gem.
How can I tell if my sapphire is real?
The Fog Test
If you’re looking at a sapphire and want to confirm it’s authenticity, just breath on it for a second. On real sapphires, the fog from your breath will evaporate very quickly (~2 seconds). If it’s fake, it may take 5 seconds or more to start evaporating and 2-3 seconds to actually evaporate.
What is beryllium diffused sapphire?
Gem dealers in Bangkok, Thailand, are reacting to concerns that beryllium diffusion is being used on blue sapphires. Beryllium diffusion typically brightens the color of ruby or sapphire, making a stone more yellow, orange, or red, depending on the original color.
Is unheated sapphire more valuable?
Yes, sapphires that have not undergone any color or clarity enhancement along the supply chain (mine to retail) are rare and therefore more valuable than heated sapphires that are abundant in the market. Are all unheated sapphires the same? No.
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.
How can I test my blue sapphire at home?
Check the gem for air bubbles.
Since they are glass, tiny air bubbles remain in them after they form. If you see any bubbles inside of the sapphire then it is not real. Be sure to turn the sapphire over and inspect it from every angle. It’s possible that air bubbles will only be visible from one angle.
How do you determine diffusion?
In most cases, a lung diffusion test involves the following steps:
- A mouthpiece will be placed around your mouth. It will fit snugly. …
- You’ll take a breath of air. …
- You’ll hold this air for a count of 10 or so.
- You’ll quickly exhale the air you’re holding in your lungs.
- This air will be collected and analyzed.
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 is gem diffusion treatment?
Diffusion treatment consists of exposing the surface of a stone to certain chemicals combined with high heat in a furnace. Generally, only the surface color changes, so if you sliced the gem in half, the inside of the stone would be a different color, usually a paler, less valuable color.
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.
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.
How do you tell if a sapphire has been heat treated?
The study of inclusions in sapphires is a sure way to detect if a sapphire has been treated. Heating sapphires at extreme temperatures change the internal characteristics so much that it is quite easy for a trained gemologist to determine if the sapphire has been heated.