QUOTE(eternity4av @ Jun 18 2022, 06:28 AM)
sure, will do thank you.
yeah, the jeweler told me that the twisted band I've chosen will be soon moved to this brand, and the price will hike, I was like amused. But aren't AGS standards are way lower if I not mistaken? Where does BrilliantC sits in between Lazare & Forevermark, I wonder.
Personally, I won't think that AGS standard is way lower. There can be discrepancy when a diamond is submitted to different lab for grading whereby one lab may say that diamond is D colour while the other the other lab may say is E colour, for example. Last time when Crafted by Infinity (a diamond brand) was still around, their diamonds have Triple Certification with GIA, AGS, and GCAL. From there you can see sometimes AGS will give higher grade, while sometimes GIA may give higher grade, in fact, there is instance whereby both AGS and GIA provide the same grade, while GCAL provide a lower grade. Nonetheless, the results should mostly be one grade apart if there is any discrepancy. Even if the same diamond gets submitted back to the same lab but graded by different peers, the result can be different. Diamond grading is still done by humans as far as I know and there can still be a subjective thing despite they are well-trained.
Another example is that the diamonds I sell sometimes can have H+ or H-. H+ means the supplier thinks that it is G colour, while GIA thinks that it is H, while H- means the supplier thinks that it is I colour, while GIA thinks that it is H. Something like that. (Updated)
Overall, the standard widely accepted in the world is still GIA. So for those people with concern or skeptical with different lab grading, best way is still stick with GIA.
Typical 4Cs are the price determining factor, including cut. But the cut in 4Cs does not determine the actual optical precision. To put in layman, imagine this as an exam, score 70% is grade A, score 90% is grade A, score 100% is also grade A.
My personal preference is actually still with cut quality that includes optical precision and for this AGS can provide more detail. Other labs like IGI or GCAL can also provide more details. All these will depend on the grading report they have chosen to use.
Lazare and Forevermark grade stones themselves. GIA and AGS are independent lab.
At the end of the day, it all boils down to what a person wants. To max value, look for typical GIA diamonds with great optical precision.
Twisted band? You bought your ring dy?
Price hike I won't be surprised. It should be more expensive to be graded by AGS since the diamonds need to send to US. AGS has only one location as far as I know. For GIA, they have multiple branches in the world.
This post has been edited by kambingkoh: Jun 18 2022, 12:53 PM