Main Gem Index:
- Quick Index -
Calibrated:
Crystals:
Facet/Cab Rough:
Concave Faceted:
Color Suites:
Precious Gems:
Diamond
Emerald
Sapphire
Ruby
Rare Gems:
C-C Garnet
Tsavorite
Tanzanite
Unique Gems:
Spinel
Sunstone
Heliodor
Birthstones:
Garnet
Amethyst
Aquamarine
Diamond
Emerald
Alexandrite
Ruby
Peridot
Sapphire
Tourmaline
Topaz
Zircon
email Support
Clarity Info:
Color Info:
Visit the International
Gem Society online!
Looking for
Beautiful handmade
jewelry? Check out:
Unique Jewelry - by Heather
Looking for
excellent rough
minerals? Check out:
Copyright
JazzanJewels 2006 |
|
| |
 |
|
|
Welcome to Jazzan Jewels!
Clarity Grading Information.
Unlike most gemstone grading systems, we do not use Type I, II, or III classifications.
Under those systems an emerald, a Type III gemstone (one typically with many eye visible inclusions) would be graded more
leniently than type Type II or I stones would be.
Under our system each stone is graded the same - so you always know what to expect.
All stones are cleaned and examined under 10x magnification.
The following definitions are used for faceted colored stone clarity grades:
- Eye Clean - The stone appears clean to the unaided eye, may have a few extremely minor inclusions.
- Slightly Included - Minute inclusions difficult to see with the unaided eye, under 10x loupe some inclusions are seen though usually none are reflected or seen in the table.
- Moderately Included - Minor inclusions somewhat easy to see with the unaided eye, some sparkle from inclusions may be seen visibly, usually no obvious inclusions on table.
- Heavily Included - Inclusions are prominent and have a negative effect on appearance or durability, may have inclusion on crown facets or may appear lightly cloudy in edges, typically nothing visible on table.
- Severely Included - Inclusions are prominent and have a severe effect on appearance and/or durability, very cloudy or visible inclusion across table or a reflected inclusion on table.
The following definitions are used for cabbed colored stone clarity grades:
- High - uniform color, no significant inclusions.
- Medium - may have inclusions or small fractures, generally uniform color.
- Low - color varies, significant inclusions and or fractures.
The GIA system is used for diamond clarity grades:
- FL - Flawless, no inclusions internally or externally under 10x examination, well cut and polished.
- IF - Internally Flawless, no internal inclusions under 10x examination, minor external blemishes or polish marks.
- VVS - Very Very Slightly included, very small inclusions barely visible under 10x magnification.
- VS - Very Slightly included, small inclusions seen under 10x magnification.
- SI - Slightly included, inclusions are easily visible under 10x magnification.
- I - Included, large inclusions, readily visible.
Note that the grades are more of a continuum rather than discrete steps.
A certain number of inclusions do not make a grade,
but rather the location of the inclusions and how they affect the overall appearance of the stone determines the grade.
|
|
|
|
 |
|
 |
|
|
|
| |
home | products | about us | search | checkout | e-mail
Shopping cart software Copyright 2003 ecommercetemplates.com
|
|
|
|
