HI - one of the couple  that i know took some gold back home. they were US citizen not sure that made an impact , they told me that immigration took their gold and did not gave back. he told me total loss was like 18000 dollar. I did not asked him on depth. not sure how helpful is this but i would not risk that.

what qlikview226 said is correct. if you are on US or other passports, you will be treated as a foreigner trying to smuggle gold, and there's not much you can do since they all work together to make sure they get the gold, and you pay the fines (which you and I know won't go to the government coffers in its full form), or unless you go to jail, in which case they make sure you get the worst treatment - you will be slapped with a court case and tangled up in legalities in your 2-week travel plans. it is very real. a family friend of ours got into this. she just didn't know anything about the 'newer' rules that prohibit carrying gold (neither did we until then). i think there were some triggers in recent years for them to tighten the restrictions around gold. no amount of 'source/force' worked.

there are similar restrictions for nepalese too although the threshold is a bit higher.

my advice is to call the nepalese embassy and find out, and stay out of trouble.

I googled and found that 50 grams of gold ornaments is allowed tax free. I assume it’s per person as it’s silent on whether it’s per person or per family. Also, rule doesn’t mention anything on diamonds.

https://setopati.com/kinmel/jewellery/181718