Where is the blue sapphire stones color from?
Its traces of iron, when present by itself, iron can produce a pale-green, yellow or brownish color, but if titanium is also present other colors may result. These include greens and blue greens and are caused, in part, by the inter-valence charge transfer. In yellow and orange sapphires the color can originate in one of several ways.
if both iron and titanium are present together beautiful deep-blue color results. Iron and titanium both substitute for aluminum in the corundum crystal structure.
Together with some diamonds to add "fire" or sparkling it could give a perfect engagement ring in blue or pink colors. The demand for the stone is maybe a bit less compared to a ruby with the right parameter but quite similar. Since this two gemstones come from the same family which is corundum they are always found in the same area (in Myanmar e.g. in Mogok and Mong Hsu) they are also on the market as synthetic stones.
Now what make them valuable? If the stone has no inclusions at all it’s probably a synthetic one just the same as the red ruby stone version because natural gems of this type without inclusions are extremely rare.
With Thai and Australian yellow sapphires are the cause, although this is not necessarily a substitution of iron. Yellow stones from these localities show very prominent iron absorption bands in the spectrum. In yellow sapphires from Sri Lanka, color centers involve a missing electron from an atom, producing a 'hole color center' r. Irradiation causes an electron to be ejected from an atom, simultaneously creating both a hole center and an electron center. Either or both of these electrons may then become excited and absorb visible . Yellow sapphires from Sri Lanka contain both fading an non-fading. color centers. Apparently the non-fading type was created by millions of years at low-level doses of radiation while in the ground the combination with titanium produces a beautiful deep blue e.g. the famous sapphire stones from Myanmar found in Mogok
Blue Sapphire Stone & Jewelry.
Blue Sapphire Stone & Jewelry shop picture above the sapphire jewelry shop is in the Bogyoke Aung San Market in Yangon Myanmar one of the premier precious stone and jewelry mall in ASEAN built during British colonial times.
Blue sapphire cabochons
Sapphire & jade brooch
Ruby Sapphire Cabochon Ring
Sapphires are most sought after in the pink and blue color spectrum but also an excellent substitution for diamonds with yellow and white hue they are gemstones with a timeless value and they also are a girls best friend not only diamonds
Sapphire Diamond Jewelry
Most popular are cornflower blue pink plus white and yellow sapphire their color result from a process known as inter-valence charge transfer. Involved in this are traces of both titanium and iron. The mystery of the magnificent blue color was not discovered until recent times.
Auguste Verneuil, the “father” of the synthetic ruby discovers that titanium and iron were responsible for the blue color but the mechanism involved eluded detection until much later.
The blue sapphire stone is a bit like jade when sold and someone asks for quality parameter he/she will find out there are none like it is with diamonds. Every dealer makes his own price and this leads to manipulations. If you stick to the four "C'" color cut carat the the clarity you are on the way for a good buy. This is are the parameters which are valid for every gemstone also all color variants of sapphires.
Further values to check are the origin Burmese (Myanmar) sapphire stones are higher rated although heat is often used to melt out impurities but this is a difficult subject because without a proper laboratory environment nobody can find that out. The problem is heated stones always have a much lower value but since most people are not able to know yes or no.
The sales men / lady usually always tells you whatever you want to hear so keep one thing in mind if you buy let’s say over $ thousand have the precious stone evaluated in a lab to be on the safe side. You can be sure everywhere they sell them there is an evaluation possibility.
The sapphire cabochon.
The sapphire cabochon which usually is oval and diffuse inside is the least expensive of the natural sapphire family. Actually, there is one exception and this are star sapphires which form a star when a light source is pointed to them because of the internal structure with rutile needles that's the same with rubies since both are corundum stones.
Precious stones in blue and oval shaped are full of inclusions that is natural means they are usually heat treated to enhance color and clarity. This is often done already at the mine e.g. at Mong Hsu in Myanmar where the mined stones are on average less valuable than the Mogok Stones because of this issue they sell for up to $ 200 per carat but the main parameters are still the 4 C's.
There are others which have been diffusion treated with beryllium to enhance color they are available for a lower price if the dealer is honest but most are not are not honest. There is rarely a business like gems and jewelry where cheating is so entrenched. Prices for natural unheated stones with excellent four “c” can easily rich $ 5000,- per carat and more but they need diamonds to make them sparkle.