... They come from a long-time source of mine that I trust. Their family was in the business back when Lake Biwa was producing. These are from a very old lot and they've guaranteed they are indeed Biwa pearls and have the paperwork to prove it as well....
Terry-- Does the paperwork specify
natural color as well? I'm wondering because the certificate I received doesn't specify these are natural color.
I've been reading the section on Biwa pearls in Strack's book,
Pearls, and I see that gray colors could be either natural or artificial in Biwa pearls.
She says that:
"The colours range from white, cream,
silver white and grey to light pink, pinkish violet, violet, red, yellow, orange, gold, brown and to bluish and greenish hues." (page 416, bolding mine)
but also that:
"Pearls from Lake Biwa were only in exceptional cases dyed artificially. The process used metal oxides, which gave either a bronze, brown or black colour.
Gamma rays were used to produce grey colours." (p. 417, bolding mine).
There is a photo of gray pearls that she thinks were irradiated, on page 411.
(I realize these are listed as lavender but several of us think they look silvery gray.)
So-- my question is: do you know for sure the color is natural?
If so, it would be nice if our certificates said so....