Clarity
Clarity plotting is to judged in terms of both inclusion and blemishes.
Clarity : Penetrating or enclosed within the Gem.
Blemish : Strictly to/on the surface of the Gem
Five(5) Factor system of explaining Gems pricing.
- Size of inclusion.
- Location (position)
- Quantity (Number) of inclusion
- Type (of inclusion) :
- Contrast (relief & color) :
Inclusion :
Some descriptive words that are occasionally used:
Included Crystal : | a solid crystal or a liquid like, often angular inclusion. |
Chip : | Small damaged area (usually at the girdle) |
Indented natural : | A dark included crystal or a hole opening inside a Gem. |
Cloud : | Any hazy or milky area inside the gem. |
Feather or fingerprint : | A partially healed fracture or fissure, or a group of small particles trapped during the natural growth process or synthesis. |
Pinpoint : | Very small, light or dark included crystal (occurring as a dot or dots) |
Needle: | Thin rod-like crystal inclusion or a fine parallel silk inclusion. |
Nick : | a Small opening or damaged on a polished surface ( at the girdle of Gem). |
Bruise : | Surface crumbling, often accompanied by tiny, root-like feathers. |
Cavity : | A large or deep opening. |
Horse-tail or pony-tail: | Fibrous inclusions radiating from a nucleus in demantoid garnet. |
Snowflake: | Whitish crystallites on a dark background in obsidian. |