You have 4.6 grams of emeralds but you need to know how many ozs that is. To get the answer divide by 28.34952 which gives you 0.16226024 ozs.

In 3.8 grams of diamonds there are 0.13404107 ozs, to achieve this take 3.8 and just divide by 28.34952.

To convert 1.7 grams into ozs divide by 28.34952 giving 0.05996574 ozs.