Blue color plating

Dear all. sending you this Email from the very dark and Smokey La
Jolla in San Diego .it is very bad here and hope you all are praying
for us. I’m making new jewelry line which I will be using
sapphire/diamond set in 18k white gold and I’ll like to plate the
area where the sapphire is in blue, is there any one out there is
optimistic enough to tell me that they have a solution for me .Thank
you in advance. DIKRAN NODZNAIA

  Dear all. sending you this Email from the very dark and Smokey
La Jolla in San Diego .it is very bad here and hope you all are
praying for us. 

I’m sure the rest of orchidland is, as I’ve been, watching your
ordeal, and praying for everyone affected. Stay safe…

I'm making new jewelry line which I will be using sapphire/diamond
set in 18k white gold and I'll like to plate the area where the
sapphire is in blue, is there any one out there is optimistic
enough to tell me that they have a solution for me .Thank you in
advance. 

I’m not aware of any simple way to electroplate a blue color. There
are some more complex coatings that involve electroplating to put a
base coat on, and then dyes, I think, that stick to the base coat,
but all that gets rather complex.

How about just using enamel, or one of the resin substitutes, like
Ceramit? these, if the base metal is clean and properly prepared
(such as sandblasting or etching, to give it some “tooth”), are quite
durable, and can apply quite a wide range of colors on top of the
metal, either opaque, or transparent colors are possible. Ceramit is
just one available brand. It’s a polyester resin. There are also
epoxies designed for similar uses.

Peter Rowe