Ruby inclusion and impurity

Ruby inclusions and impurities

Ruby Stone inclusion and impurities including cracks and heat fixes plus resin and surface treatment in Myanmar Thailand. The value of a ruby stone is categories by some parameter. To put it together this are how clear the gem is plus naturally the size plus color and are there cracks?. Next are impurities which came up during the creation of the gemstone this are

Pre-Existing (Protogenetic) - Inclusions that have formed before the host. These are strict of a solid nature. I. Solid Inclusions - Crystals and/or glasses formed before the gem and trapped by the growing gemstone.
rose quartz pendants

The crystals may appear either as heavily etched or corroded individuals which formed long before the host or as well-formed crystals which developed just prior to the host.

Impurity Examples: Various such as quartz and spinel in ruby.

Contemporary (Syngenetic) - Inclusions that have formed at the same time as the host. 

I. Solid Inclusions - Crystals and/or glasses formed at the same time as the gem and trapped by the growing gemstone. It is usually impossible to tell just from a microscopic examination whether or not a solid inclusion formed before the host. Examples: various, including calcite and dolomite in ruby from metamorphic environments 1 such as Mogok, Burma).

II. Primary Cavities - Negative crystals. cavities which may or may not look like solid crystals and which were formed while the gem itself was growing. They may be trapped for a variety of reasons, most commonly due to rapid growth. When a crystal grows very rapidly, it no longer grows with smooth, flat faces, but instead grows with faces that have channels. Such channels provide perfect pockets for trapping of the growth solution. Primary cavities may be filled with liquid alone (single phase), liquid + gas or liquid + solid (2-phase), or liquid + gas + solid (3-phase). Examples: negative crystals are commonly seen in all minerals, especially in gems which grow from solutions, such as quartz, fluorite, beryl, corundum, topaz, etc.
III. Growth Phenomena A. Primary Twinning - Twins that formed at the same time as the host (growth twins). These typically occur as single planes only, rather than repeatedly.

Examples: Spinel and diamond macles growth twinning in Sri Lankan and Kashmir Sapphire just keep in mind that ruby and sapphire stones are from the same source which are corundum gems. 

B. Colour Zoning - During a crystal's growth, the coloring agents may not be available in completely consistent amounts. The result is a layered appearance of lighter and darker lines (or bands) which follow the external surfaces of the crystal. This is similar to the growth rings of trees, except that with single crystals, the external surfaces are flat and meet at specific angles. Thus the growth lines of single crystals will always be straight lines (never curved, unless one looks in directions other than parallel to the face of which they formed).