eye-visible Inclusions visible to the eye without magnification.
face up The view of a gem from the top or crown.
fancy color In diamond, any color other than colorless viewed face up; in diamond any color is a fancy color.
What slaps them? The Eye-Visible Inclusions!
Visible Inclusions
Most people really do judge the quality of a Diamond all based upon the fact that they can either see the Inclusions with the naked eye, or they can't! ...
Small fine emeralds will not have eye-visible inclusions, but as sizes increase inclusions are generally more apparent. Top quality emeralds are exceptionally rare in sizes over a carat and are very expensive.
While emeralds with no eye-visible inclusions do exist - these gems are extraordinarily rare ...
Eye-visible inclusions are normal in rubellite, and loop-clean gems are rare. Generally, the more saturated the color of a rubellite specimen, the more included it is.
Even though the gem is typically mined with eye-visible inclusions (even at the collector level), emerald is the most popular colored gem in America. Probably 98% of all emerald discovered would be graded Heavily Included (HI) or worse at the AGL.
Many microscopic two-phase inclusions can be seen as well as eye-visible bubbles that move as you rotate the crystal. A few dendrites were found in the formation of branching trees.
I1, I2, & I3 - GIA clarity grades assigned when there are obvious inclusions in a diamond which may be eye-visible, face-up.
Diamond Color Grade: ...
Diamonds falling in the Imperfect grades will more commonly have eye-visible inclusions, but an Imperfect grade DOES NOT necessarily mean that the stone will be unattractive to the eye.
However, through market experience, we learn to expect certain degrees of clarity from certain gems. For example, aquamarine is generally expected to be clean with no eye-visible inclusions and yet emerald is held to a lower standard because it ...
you can find microscopic crystals or minerals (called "inclusions") inside almost every diamond, giving each diamond its own unique personality. The size and number of inclusions affect the value of the diamond, especially if they are eye-visible.
a gem is considered flawless if no inclusions are visible with the unaided eye (assuming 20x20 vision). The Gemological Institute of America classifies tanzanite as a Type I gemstone, meaning it is normally eye-flawless. Expect gems with eye-visible ...
SI1 or VS2 will give you a beautiful diamond at a much lower price tag. However, before purchasing your diamond, please consult with one of our expert Customer Service representatives to ensure that your diamond does not have any "eye-visible" ...
Although it sounds like you should be able to pick these out a mile away, well done pieces show no red color, face up, and no eye-visible demarkation between the glass and the garnet.
 See also: Inclusion, Stone, Inclusions, Eye, Color
  
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