It is not even a Triple Excellent to start-off. Perhaps you can share your budget with us?

Update:

Here are some diamonds I picked, ranked accordingly
J VS2
https://www.whiteflash.com/loose-diamonds/r...id=myengringexp USD 579 (this one has crown angle 34.6 degree, therefore, theoretically, it has slightly lesser fire compared to the others listed here. However, this diamond has excellent scintillation and the cut is better than the second diamond slightly because it has lesser light obstruction which you can safely ignore. The Hearts & Arrows also may not be the best, but it is good enough. Nonethless, the ASET for this diamond looks more promising compared to the others because it does not have "light green" below the diamond's table. Overall, this is a pretty balanced diamond that is safe to buy.)

https://www.whiteflash.com/loose-diamonds/r...id=myengringexp USD 571 (this one has excellent scintillation as well, but I noticed that the  cut is not as good as the first diamond because there are some slightly bigger patch of "darkness" behind the arrows, which is probably caused by light obstruction.)

https://www.whiteflash.com/loose-diamonds/r...id=myengringexp USD 546 (this one has excellent scintillation, but the IdealScope looks whiter than the others, meaning the light return is not as good as the others listed here. Light return can improve the overall look of the diamond because it can make it look whiter. If you like fiery diamond and don't mind the weaker light return, this diamond is a good buy)

J SI1
https://www.whiteflash.com/loose-diamonds/r...id=myengringexp USD 510 (this diamond is an SI1 diamond, but to me, the cut is not bad, especially the arrows. The video does not impress me that much though, but based on IdealScope, this diamond looks promising enough. Although they may be weaker light return at the 6 o'clock position of the diamond and the ASET also show some "light green", below the diamond's table, but that is something quite minor in my opinion. If I were to rank this diamond against VS2 above, then it will probably be the 2nd pick).

Note: All are affiliate links, meaning I will earn some commission if you buy using these links.

Hmm, that is a Tiffany setting? 

1K is consider quite okay in my opinion.

Great that you have a satisfying purchase.

Hemera 101 is a modified round brilliant, it has much more facets, hence the extra blinks, but the blinks will be smaller compared to the bolder blinks produced by traditional round which has 57 facets. If possible, always ask the salesperson to show you the diamond under normal office light (they surely have a back office), or go out under sun light (maybe not possible depends how far the shop is from the entrance/exit).

Personally, I don't think it is worth to spend extra cash on all these extra facets, but then, each person has his/her own liking.

Thanks for sharing bro! 

Btw, there is a private jeweller who is based in Penang as well - Frou Frou Jewellery. Do check her out if you are interested or your friends need other options.