Norbergite is an uncommon mineral. Except for micros, euhedral crystals are known almost exclusively from quarries in the Franklin marble, Limecrest being probably the most significant of these. The crystal on this specimen is ~ 1.5 x 1.0 x 0.75 cm. These things are extremely brittle and nearly impossible to extract from the matrix without some damage, but this one is in fairly good shape. The front is essentially complete. The back has some pits/chips, and there is a crack. The faces are more distinct than they appear in the photos. (But norbergite crystals are almost never truly sharp.) There is a fairly bright pale yellow response under SW UV.

Over the years there has been a lot of controversy re norbergite vs chondrodite in the Franklin marble quarries. Current expert opinion is that fluorescent material is norbergite. The norbergite is associated with graphite in a matrix of non-fluorescent calcite.

Single item shipping weight (with TN case) is 3.1 oz (116 g). For shipments outside the USA, up to a total weight < 8 oz (225g), this can be combined with items from this or other auctions for the same postage.

Within the USA, postage for total weights up to 13 oz, ranges from $4.25 to $6.50 (including packing etc) regardless of destination. Above 13 oz, I will use Priority Mail ($7.25 - $9.20 including packing – varies by destination).