Calculation of metal weights

The factors shown in the left hand column above will enable you to estimate given metal weight from either wax or another metal type.

Examples

• A wax pattern of .32 gm for which an estimated weight in 18ct Yellow Gold is required:  .32 gms x 16.25 = 5.20 gms
• An item weighing 4 gms in Stg.Sil. for which an estimated weight in 9ct Yellow Gold is required: 4 gms x (11.75/10.75) = 4.37 gms

NOTE: We find it is easier in use to convert back to wax and from there to the required metal type.

Working Example

• Catalogue Pattern C1083 weighs 2.79 gms in Stg. Sil.
• Divide by 10.75 to obtain a wax weight.
• Multiply the wax weight by the figure from the above list which corresponds with your chosen metal.

e.g. wax weight .26 gms x 11.75 (9 Yg) = 3.06 gms.

Therefore design C1083 in 9 Yg will have an approximate weight of 3.06 gms