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  Author   Comment  
Steve Nyberg
 #1 
I have previously polished but subsequently damaged edges and corners
Can anyone repair polished Iceland Spar crystals.
I live in the NYC area.
Bob Harman
 #2 
STEVE,      Iceland spar is the colorless and transparent variety of calcite.    As you probably know, calcite is soft and cleaves very readily.    As careful as you might be, trying to work with (polish) these specimens often results in damage. Even tiny internal fractures can readily lead to cleaving when working with the material.
 Once damaged, the examples are difficult or impossible to satisfactorily repair, especially at the corners and edges.  If small pieces are broken, for any satisfactory repairs to look good, you probably need a glue with a refractive index very near or identical to that of the calcite otherwise the areas repaired will stand out and be readily visible.    I am not an expert in this, but the only other option that I can think of is to very carefully "redo" (repolish??) the damaged edges and corners. But how??? Anyway, if you are able to do this and it can be done well, maybe the examples will then look "ok".          

BTW, say hello to Forest Hills Queens; I grew up there!                BOB
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