As a practical approach, when you don't have the opportuity to examine the material yourself, it is best to place no reliance whatsoever on terms such as "premium" and "grade A" and "presentation grade" unless you happen to have a pretty good idea of the qualifications and integrity of the person making those representations.
Roger
UNLESS the maker, represents, and is willing to back it up with a proof-of-purchase, that the supplier is like the afformentioned ironwood guy, Chuck Bybee(Alpha Knife Supply) or Mother of Pearl Company, because you can SEE the differences online, and they clearly state in many cases what the grading system represents....
From Mother of Pearl Company website:
Presentation Grade is the highest grade of Mother of Pearl obtainable. This grade of pearl has no fractures, defects, discoloration, holes or unfavorable markings.
"
A+" Grade is very similar to Presentation grade. Usually, this grade will have one very minor flaw at one end of the scale. This flaw will usually include yellow coloration, and/or a slight fracture. Usually, this flaw can be cut around or trimmed away.
"A" Grade is also a very high grade of pearl. Pieces will have a flawless front side. The reverse side will generally have minor shallow fractures, some yellow coloration, and/or a slight worm hole that can be avoided.
"B" Grade is still a workable grade of Mother of Pearl and is commonly used by beginning knife makers or knife makers that make relatively inexpensive knives. "B" grade Mother of Pearl will still have a flawless front side. The reverse side will have some deeper fractures, more discoloration, a larger worm hole that has been filled, and/or some exterior bark.
Makes a big difference in price, too:
Pres. Grade A+ Grade A Grade B Grade
$53.00 $40.00 $29.00 $18.00
Best Regards,
STeven Garsson