Wanted to share a photo taken today by the grading gem lab that compares the color difference between Amora Enhanced Moissanite, and Charles and Colvards 'new' enhanced Moissanite called 'Forever Brilliant'.
While the brand name is new, the technology is not - this is the same as the 'old' enhanced Moissanite's from before. It is a process done by Serenity Tech where a softer than emerald coating is applied to the back of the stone (quartz coating).
The coating is imbued with two different dopants that attempt to color cancel yellow tinting (via pink) and green tinting (via blue).
For a 1 ct round, the result seems to be a color improvement of roughly 1 color grade, but at the expense of imparting a grey tone to the stone (the effect of the color cancellation). The Forever Brilliant Moissanite is labeled as "C&C coated" below:
In terms of final color grading - 1 ct round:
Amora Enhanced Moissanite: H color
Forever Brilliant Moissanite: J color
CTHR has also apparently decided to copy Amora enhanced pricing to the dollar with the Forever Grey, I mean Brilliant, product.
However, unlike Amora enhanced, you won't get an independent grading report and in my opinion, the above results likely show why. But, here is what one looks like for a 1ct Forever Brilliant:
As noted, the coating for the Forever Brilliant is softer than emerald, so it is not considered a permanent treatment. The Amora enhancement is intrinsic to the stone itself, so there is no coating that could wear off.
UPDATE: The CEO of Charles and Colvard now has publicly stated that the Forever Brilliant is not a coating...so we will be setting up an XPS testing to prove that it is:
Q: My understanding is its more of a coating [colored moissanite] whereas it sounds like this whiter moissanite really does affect the entire jewel so it’s a different process?
The white moissanite, you can literally saw the stone in half and its all the way through.
It changes the structure internally in the stone so that it uh filters In the past it obviously filters out white and gives you the flashes of yellows and faint greens, and it changes that structure so that its reflecting back white.
Q: Great, that’s good to confirm that.
The Forever Brilliant was purchased directly from the C&C website and clearly has a coating...so there will be follow up testing and posted results.
I did do some research and found a report from GIA that tested the Serenity coating process when used to add color to diamonds here: GIA report on Serenity Coating process and durability
The highlights - GIA states:
"As the durability testing indicated, this is not a permanent treatment."
SiO2 films… have a Moh's hardness close to 7.
"Retipping of a prong with a low temperature solder caused a pronounced change in the appearance…"
"…following rhodium plating, approximately 10% of the surface showed evidence of damage…"
"…the coatings…were removed where the pavillion facet was polished with a wheel charged with either Tripoli or Rouge".
Here are some photos, from the GIA report:
If stone is touched during ring polishing:
If stone is exposed to heat during low temp retipping:
Finally, if stone is rhodium plated (I suspect the electrical charge used in rhodium plating undoes the bonding between the quartz coating and the stone):
For comparison, here's a copy of a raw moissanite grading for example: