but why would they need to give a good thought to grading if they already are the great Tiffany? Here's my understanding of why not:
Probably this sounds too critical to start with, but such value judgment from the seller is just saying "trust me or go elsewhere". Such words are just as good as the seller's appraisal (and of those there is much talk here), as far as I understand.
A one word seller's appraisal of "presence" leaves you no choice about the jewel, only the choice to shop elsewhere. Taugh, when "elsewhere" is out of Tiffany's, easy when "elsewhere" means around the corner to the next look alike.
"Presence" makes those Tiffany diamonds literally incomparable... 'cause no one else uses their quality grading, right?
Same as any proprietary grading tool: these may prove that some diamonds are great but limit one's quick choices to a handful of sellers that actually use the tool.
There is a bright side, of course. It sounds like a good idea to give a holistic grade of "beauty" (or "presence" or "warping") and make buyers read one word instead a whole technical guide. Also, a simple, one word diamond life sentence makes many Pricescope questions ("how does clarity affect brilliance" or "does this color grade look tinted") all but redundant - one just gets a simple message "this looks great".
The obvious downside is your trading your choice for the seller's. If you like Tiffany, you will like the "presence" of their diamonds without wanting to know more. Quite the opposite from what the four Cs were meant for, for better or worse.
On the aside... I've already spent allot of time building such quality indices myself
As a direct consequence, I sincerely doubt I may ever accept one for granted.
The 'never in a Tiffany diamond' section states they do not accept stones with naturals, graining, polish lines, fluorescense, black inclusions, knots, pits etc.
but when you read their site it seems that their main sales strategy is to terrify you into buying their diamonds by "subtly" suggesting that you're going to end up with a complete pile of dogs&%t if you don't.
"of all gem-quality diamonds, only a fraction ever meet tiffany's strict quality requirements"
"discover exactly what tiffany & co will not accept. and why. stricter standards make all the difference."
etc etc
i suppose it's smart marketing on their part. also you must check out the video on this link, i have never heard so many hundred dollar adjectives strung together in one paragraph.
You can find a stone with all the "nevers" of Tiffany with a little effort here or elsewhere...If you can't be bothered or don't have time, and have the disposable income, then just go to Tiff's and buy their stones...but you still have to look at the cut...my understanding is that not all of their stones are truly superior cuts/makes by Pscope/H&A standards.
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