We have deemed the items in this section of our website to be RARE if:
1. The pattern is rated a 1 (rarest) or 2 & 3 (very rare) in the "Relative Value Guide" in Pearson's Vol. III.
2. The pattern or unusual shape appears in "Rarities in American Cut Glass" by Wiener & Lipkowitz.
3. The pattern or shape is deemed RARE by a consensus of advanced collectors and experienced dealers.