This type gemstones is created in controlled laboratory conditions.
They have the same chemical composition and physical properties
to that of the natural gemstones.
Various methods are used to create synthetic gemstones. Some of these processes can be
very expensive. Sometimes a Lab Created gemstone can even cost more than the natural
stone. For the most part these processes provide us with excellent looking gems. At a more affordable price.
What is opal?
Well, technically, opal is SIO2 and a minute trace of h20, bound together in a latticework
that resembles marbles in a fish tank—all settled in nice, orderly little rows. Because the
silica is generally spherical, each tiny particle adjoins its neighbors, but never flat surface
to flat surface.
Light passes amongst these particles, speeding up and slowing down as the size of the spheres and spaces between them changes with the angle of view. Thus, longer light waves produce
RED color hues and the shorter waves produce the BLUE color hues.
Remind you of the prism you saw in grade school? In fact in simple terms, opal may be
thought of in this same way. These little silicon balls all lined up in their little rows. Touching side to side, have a kind of triangle shape between them. Which throws out light much the
same as that prism did.
Simulant or Imitation
These are a look alike to real gemstones. The chemical composition and physical properties
are not the same. These stones only look alike. This is often the case when a material like
glass is cut to looks like ruby, sapphire or emerald.
Another typical example is Cubic Zirconium. Totally man made with no natural counterpart.
But when cut, it looks remarkably like Diamond . In most cases these types of stone can be identified very easily.
You can find both types of Opal jewelry in .925 sterling silver at our store Visit My eBay Store: Silvernmore-Inc