New blue busts...

Trinketts

Trinketts

and the reverses

kryptonitecomics

Oh my.......now those are some great coins.....very nice

Trinketts

Think these will both get EF?

Trinketts

Does anyone know what causes the blue in these halves...

MikeKing

<< <i>Does anyone know what causes the blue in these halves... >>



interesting question. i've been wondering myself.
this is an 1830 I picked up from the Reiver sale:

MikeKing

in the clock world, steel hands and screws are heated to a high temperature and then quickly cooled, yeilding 'blued' steel.
My quess is that this is a sort of annealing process, hardening or stregnthening the surface. It's a steel oxide. But what is steel but an alloy of iron and carbon, and I believe there are different kinds of steel of varying degrees of hardness produced by alloying with other metals like chromium or molybdenum (I could be entirely wrong). I believe silver oxide would be black, but then, steel, if heated at a higher temperature and cooled can become black. Also, I don't know what was added to the silver used in coining the Bust coins and if the kind of silver used varied from year to year and allowed for different kinds of toning. Maybe Tomb can answer this question.

CoinAddict

Very nice coins.

ms70

Nice busts!

bgrice

Those ARE pretty busties.

DeputyPud

I bought a complete set in an old Wayte Raymond holder. Many of them had a very old light cleaning and had re-toned. Some had no evidence of cleaning.
All had almost exactly the same periphery toning that yours have (perhaps just a wee bit darker blue).

Trinketts

The 1822 looks alot like this coin in the coin fact banner for PCGS.

Trinketts

Double post delete...