antique "pearl?" pendant

[anthony]

Dear Sirs,

I have an antique pendant, with a top in silver and gold with some small rosecut and old mine cut diamonds, and an eggshaped "pearl" or stone.
The colour from this "pearl" is graded/banded white-gray-brownish. It has no lustre or flame structure, but clustered holes translucent filled.
Hereby I will attach a scanned image.
Could this be a pearl, like a Melo Melo or Conch? Or maybe a Cave pearl?

Kind Regards

 

[anthony]

Hello Zeide,

I do not think any coating has worn off to result in this banded coloureffect (white-grey-brown)
Enclosed a better picture than the photoscan.

Regards

 

[anthony]

plus another picture showing the white bottom

 

[Jnorris]

Hi Anthony,
Your new photographes are more helpful then the first. It came from a variety of either Scallop or Clam.

 

[anthony]

is it rare? any idea of value? comparable to a "normal" natural pearl in the same size (0,6 x0,4 inch 10 carat)?

 

[Jnorris]

Hi Anthony.
It is rare but with out seeing it in person I could not give you a true value. When found in a stronger color (purple or Orange) Pearls of this nature can sell for as much as 500/ct wholesale. Lesser quality goods (with good shape) or those with less desireable colors go for significantly less(75-150/ct)

Best Regards.
Jeremy

 

[anthony]

Thank you Jeremy, and a happy New Year
Best Regards

 

[anthony]

Hi Zeide,

The pendant is made around 1880-1900 so fading is possible. I don't know if the piece always had this pearl (it might be changed later)
Thanks anyway and a Happy New Year to you!