How can you tell the difference between high quality emeralds;as compared to those of lesser quality???

Answer 1

the typical color is a beautiful,hue known,in fact,as emerald green and its due to traces of chromium in the crystal structure
but they can be light or dark green,bright green or leaf green.The
vitreous luster its not outstanding,and is strongest in medium-light stones with few inclusions.ALL emerald contain inclusions,
although in THE BEST quality stones,these are very faint and not visible to the naked eye.They show up under a 10x,20x or 40x lens.
the most common shape for gems is the STEP or TRAP CUT,which is also known as the EMERALD CUT.
By the way Colombia is the number one source of high quality emeralds (Chivor and Muzo mines)the biggest and most beautiful emeralds come from this mines.
about the value ,stones of fine color,weighing more than 2 carats
are among the most highly valued gemstones,and their price
may equal or exceed that of diamonds.less ideally colored varieties--TOO DARK OR TOO PALE--are worth quite a lot less;
and if they are slightly turbid as well,the value is reduced even further

Answer 2

The producing greaters of emerald of the world are Brazil, Colombia and South Afrika.

What it differentiates the best quality gems is the color, the absence of inclusions and the size.

It's very commom the use of products to give clean appearance for the gems. Take care.

The calls synthetic gems present same crystalline structure e, essentially, the same chemical composition of its natural equivalents. The only difference is that they are not crystallized in the deepenings of the Land, but yes in sophisticated devices. Sometimes it'll be necessary optical devices to know the natural stones and the synthetic ones.