I'm sure you can find both of these items quite readily in the U.S.
although true Oxblood Coral is getting absurd prices these days here
I would be interested to learn if the client knows the problems
associated with natural yellow sapphire. The green is considerably
more stable than the yellow. The stones that have a strong green
will retain their yellow quite well but if the green is very pale
the yellow fades and washes out much quicker. The resultant stone is
not attractive. Fading can be prevented by avoiding daylight but it
will fade faster than a Kunzite.
In my opinion Natural yellow Sapphires, Brown Mexican Topaz,
Kunzites and any other 'faders' should NEVER be used in jewellery as
these are collector stones that need to be stored properly to retain
their 'natural' beauty.
Vancouver, B.C. CANADA