Hi
@noobzpro
If you're looking for lab grown, GIA doesn't talk about growth method or even report type2a/b for lab growns. But either way for lab/natural they don't talk about light performance at all so you can't see light leakages, can't see if there's any milkiness/graining/brown/green hue cause GIA doesn't show any video or photos of the diamond at all.
They only go by proportion which is honestly not enough to go about since you still need the ASET to accurately see the light performance of the diamond of the whole 57 facet (if you're looking at normal round brilliants)
here some more details of what GCAL 8x certification provides
- 360 view of your diamond
Top and Bottom view , Fire video and Scintillation video
Brilliance , Symmetry along with hearts and arrows
for a GIA certificate , i feel that not a lot of information is being revealed haha
the only shop that i know of which uses Gcal 8x certificate in SG is jp.
I feel GCAL8x is far more transparent and detailed for consumer.
The reason why you see more GIA certs than GCAL 8x reports is just cause most retailers won't want to spend that extra USD$100-150+ compared to GIA/IGI to go and certify with GCAL 8x when most of their inventory probably wont even pass Gcal 8x. From what i know its extremely difficult to get a 8x grading. GIA not stating the differences between those, would just make all of them look equally good on paper as 3 EXC, since most consumers don't know what to look out for anyways which is how most of us end up here when we deep dive into more research haha.