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LDA b may have patyern. LDUL usualy has no pattern.

The stone is nice!

Yup ... its a coticule...but ''guess the layer'' is a fun game these layerig sistem was originaly established by the miners at Ol Preu quarry. Some other mine used layering systems but not all looked...

What you are looking at is a La dressante au bleu with a small layer of La dressante upper layer glued to a slate.

Usualy the La dressante au bleu is the bottom dressante natural combo with BBW......