Yaffie Blog

Methods of Diamond Color Treatments

Methods of Diamond Color Treatments

Helen George 16/05/2020 0
Currently, there are two principal methods of permanently changing the color of a diamond: ♦ Irradiation + Heating ♦ High Pressure High Temperature Heat Treatment (HPHT treatment) Both of these treatment processes are considered legitimate as long as they're disclosed to buyers. Unfortunately, some people try to pass off treated diamonds as naturally colored in order to get a higher price. So before investing a high sum of money in a fancy-color diamond, have the stone tested by a reputable gem ...
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Getting Her Involved Is Important When Choosing Rings

Getting Her Involved Is Important When Choosing Rings

Claire Falkenstein 06/05/2020 0
A common question that guys struggle with is whetherthey should involve their girlfriend in the process of choosing the ring. The thought of blowing her mind with a surprise proposal featuring the perfect sparkler is enticing, but this carries with it the very real risk that you could choose a ring that she doesn't like. There's no right or wrong answer to this question and there are three ways to tackle it: 1. Going all out secret squirrel 2. Discussing options with her before shopping yourself...
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Story of Fancy Colour Diamonds

Story of Fancy Colour Diamonds

Kenneth Lane 06/05/2020 0
On April 28, 1987, a 0.95 carat diamond was sold for $880,000 at Christie's in New York. It contained two large flaws, one of which was a deep cavity in the table (top center facet) of the diamond. Despite its flaws and small size, it set a new world record per carat price for any gem sold at auction: $926,000 (reported by the summer 1987 issue of Gems and Gemology). Why did that diamond command such a high price? Because its natural color was an extremely rare, deep, purplish-red. Color plays a...
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Diamond Fluorescence

Diamond Fluorescence

Kenneth Lane 06/05/2020 0
If you were to place a diamond tennis bracelet under an ultraviolet light, many of the diamonds would probably have a noticeable blue glow and some would probably show hardly any glow or none. This is because diamonds are often fluorescent, which means they omit light when stimulated by UV lights or sunlight. Normally the fluorescence is blue but occasionally it's yellow, white or orange. The Hope Diamond has a distinctive red fluorescence. There's a lot of misinformation about diamond fluoresce...
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How Objective are Diamond Colour Grades?

How Objective are Diamond Colour Grades?

Kenneth Lane 01/05/2020 0
Color grades are not as objective as people would like them to be. Even when the grader is someone as highly respected as the GIA, the color grade can be questioned. Russell Shor, senior editor of the JCK (Jewelers' Circular Keystone magazine), pointed out in their September 1987 issue that sometimes the grades of diamonds change when they are sent back to the GIA for re-examination. In 1995, Shor did a study of five diamonds which JCK sent to three major US gem labs. Only one of the diamonds re...
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How to Grade Diamond Colour ?

How to Grade Diamond Colour ?

Kenneth Lane 01/05/2020 0
Probably the best way to learn to color grade is to ask your jeweler to show you how. He or she will have some loose diamonds, a paper or plastic white grading tray, possibly a set of graded comparison diamonds called master stones and a good diffused (not bare) light source such as a daylight-equivalent fluorescent light. You might be surprised when the jeweler places the diamond upside down on the tray and has you look at the color through the pavilion (the backside of the diamond). This, howe...
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