Ohh my gods bro. Have you bought it??? If you haven't then better don't get Forevermark bro. I saw their diamonds before, totally not worth. You are paying more for the brand.

Ohh OK.

Mind sharing its certification number for the pros here to have a more in depth analysis?

Well, everyone has their own preference. Asian market is more concious on brand.

Anyway, let's take branded goods as example. When I buy an LV, I would probably say one of the reasons will be workmanship, e.g. You can easily see the stitches are good. However, let's say one of the LV has bad stitches, will you buy it for such high premium? I guess not.

Similarly, same concept should be applied to diamonds. If big brands were to charge a high premium on their diamonds, at least show that it is worth it. In fact, it is actually very very very easy for them to proof it, but very very very impossible for them to execute such move because this will translate to higher time to market, lower diamond production due to QC, and lower revenue. Even if they put a higher premium on the diamonds, I believe the revenue will still be lower because affordability of the market becomes narrower... Well, this is just based on my thinking though,  but at the very least, big brands should start to show the necessary images to back it up.

In the case of that 0.46ct, I believe the cutter definitely knows what he is doing based on the crown and pavilion angle. But then in order to retain weight, he is not willing to sacrifice the depth because this would translate to lower carat, and lower selling price. It is pretty common in that industry I believe, but it is good that there are cutters that are more of a purists that would be willing to sacrifice on price to get better cuts. We just have to know where to buy such diamonds in order to make the most out of our hard earned cash.

Diamond is just a tool to get what needs to be done. You have put in effort to get the best option that is offered to you, so that's all that matters.
USD 1800 x 4.4 = RM 7920
Add 6% GST = RM 8395.20
Add custom ring setting RM 1000 - RM 2500 = RM 9395.20 - RM 10895.20

Looking at this calculation, if you get one of the best super ideals @ E VS1, shipped it into Malaysia, then custom made it with a 18k white gold ring, the maximum price that you need to pay is actually higher than what you have paid. But we can probably get the custom setting done at around RM 1300, so the price will be RM 9695.20. So you at this moment, you are overpaying by RM 504.80.

Price difference of poorly cut diamonds and excellent cut diamonds are at 30% according to this site: http://www.naturallycolored.com/buying-guide/diamond-prices. Your diamond's cut won't go down into poor, so I am just making a guess that it should probably be cheaper by 10-15%. Let me use 15%. So your loose diamond price may cost around RM 7920 - 15% = RM 6732. Add on the earlier custom ring setting at RM 1300. So my guess for the final fair price should be around RM 8032 (just educated guess). So, the brand "Forevermark" has a premium of RM 2168.00.

Also, if you ring setting comes with palladium or comes with side diamonds, it should be more expensive than RM 1300. If that is your case, the brand name will cost somewhere below RM 2000.00.

All branded goods, we pay a premium for the brand. So, do you think a brand is worth around RM 2000? If you can accept, then be happy about it man. Getting the ring onto her finger is the most critical priority!

Congratulations and may the force be with you. 

Curious, what is the crown height and pavilion depth of your diamond?

Hmm, how about the girdle thickness?

I see. Seems like they retain some weight at the crown area of the diamond. 15.9% crown height. Anyway, since you already bought it must well enjoy it. All the best with your proposal!