Hi Toni,

Thank you for contacting Mearto with your appraisal inquiry.
You don't say how many of the small plates you have but it looks like its about 10 and which I've based my valuation on; if its a different number please let me know and I'll update this appraisal ASAP.
Based on the photos and information provided, and subject to examination, this is:

A set of early American amethyst bright cut pattern glass nappies
Unattributed maker, late 19th century
Comprising a large squared nappy and 10 smaller nappies
10 inches square (the larger) and 5 inches square (the smaller)
PROVENANCE: acquired at auction
$400-600*
*represents a fair-market value for auction purposes; retail or asking price may vary.