You can call again. There are two things you should pay attention to:

1, even worse.

2. The gloss of the finished product is slightly darker.

A ring is redundant after processing, and it can also be attached to the foot of the ring. In that case, your ring will be much smaller, which is not worthwhile.

Because after the jewelry is processed in batches, there will be a cross-color treatment, and it is impossible for him to give you a cross-color product. No matter how good platinum is, for its brightness and polishing, it will be plated with another layer of platinum, and this cost needs to be borne by consumers.

Extended data:

Identification method of platinum ring:

Look at the mark: each piece of jewelry should be engraved with the chemical composition seal, such as (pt 900) and (PT 750). All stamps starting with "PT" are in the color of platinum ring jewelry: platinum rings are tin white, that is, white with gray and bright luster.

Hardness test: the hardness of platinum ring is 4-4.5 degrees, which is harder than gold and silver. It is scratched with a knife or glass, but it will not be scratched by nails. Density measurement: Platinum rings are extremely dense and feel heavy. The density measured by hydrostatic pressure method should be 2 1.43g/cm.

Melting point: The melting point of platinum ring is as high as 1773 degrees. Burn the platinum ring on an alcohol lamp or electric stove, and the color will not change.

References:

Baidu Encyclopedia-Platinum Ring