Emerald is the brightest representative of beryls, one of the most famous and one of the most beloved precious stones in UK
Emerald is the brightest representative of beryls, one of the most famous and one of the most beloved precious stones in UK. Let's discuss a simple traditional method of improving the quality of emeralds - oiling.
Oiling is recognized as permissible in the global gemological community as a non-destructive and non-altering stone structure. Filling cracks with natural cedar oil is considered the most harmless. The result is reversible but stable.
In total, there are several degrees of oiling - minimal, moderate and significant. It is almost impossible to see traces of oil even through a tenfold magnifier but can be seen through a microscope. The most accurate determination method is spectroscopy. In pursuit of improved stone performance, some dealers use more serious artillery - resins.
In a listening article, we will describe in more detail about this method of ennoblement.
What do you need to know about sapphires when choosing a piece of jewelry?
About 95% of sapphires are somehow exposed to temperature. The most common way is heating. After this operation, the stone becomes lighter or more saturated. You can hardly determine that the stone was heated. Not even every gemologist can understand this.
Sometimes sapphire is ennobled. Most often, this is done using diffusion staining. The stone is placed in a diffusion medium - for blue in titanium, for yellow - in beryl, and then heated. After this operation, the facets of the stone are re-polished.
Beryl diffusion is almost impossible to see. However, traces of titanium diffusion can be seen under certain lighting conditions in a magnifying glass. The concentration of color on the faces and in the area of the cracks will be quite noticeable. If the stone has not yet been fixed in the product, you can quite understand it.
Stones painted in this way lose their color over time. Primarily if jewelry boxes often interacts with chemistry. It is easy to explain this phenomenon: the coloring element does not penetrate deep into the stone; it is distributed over its surface.
If you buy a finished product, then you are not insured from the purchase of ennobled sapphire. Dishonest sellers block access to the pavilion (the bottom of the stone), and the ordinary buyer is deprived of the opportunity to verify the purchase "by eye".
In our studio, we do not use diffused sapphires. You can see for yourself! First, we let you know the stone before we fix it. Secondly, at significant rates, we make certificates from proven gemological laboratories.
From time immemorial, pearls have been a sign of wealth and wealth of noble families. How many colors of pearls do you know? Our gemologist Elena talks about the most exciting shades of these fantastic nuggets.
They are most familiar with white pearls with a warm pink tint or cold grey. When our lover of jewelry meets other shades and types of pearls, a small heap takes it. The variety of pearls is excellent. What kind of gems are there?
Akoya
One of the most famous. Size on average reaches 7 mm. White pearls with a pink overtone, with a mirror shine, are considered the most valuable, grown in Japan, China and Vietnam.
Pearls of the South Seas
Size from 8 mm to 18 mm. The most famous is the golden color. Unlike Akoya, it has a soft sheen. Collecting a string of round pearls of the same hue and size is unusually tricky. Mostly Pearls of the South Seas are sold in pendants, earrings and rings to make this type of pearl more accessible to connoisseurs of this color. Especially popular in Asia.
Tahiti
One of the most unusual colors is the metallic color of Tahiti pearls. Each overtone of Tahiti pearls has its trade name. Such as a peacock (peacock), pistachio (pistachio) and aubergine (aubergine). These pearls look magical in white gold or platinum. The most valuable is the pistachio color - a pink-purple color and a dark grey-green overtone. The main production site is French Polynesia.
River pearls
Size 2-13 mm. River pearls can be of various attractive colors, but only 2% of the total volume will be beautifully round. Often, river pearls are additionally stained to provide further color saturation. The most attractive colors are called types of spices or fruits. The main producer of river pearls is China.
Caches
Sea and river pearls, which is ideal for designer jewelry, as non-standard shapes, colors and sizes.
Mabe
The upper part of Mabé is the hemisphere of the pearlescent part of the shell. They are often used in rolled rings and earrings. Create the effect of a large pearl, but not one.
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