When collectors hear about Vivianite they will think of Bolivia - during centuries Bolivia produced the very best ones world-wide; until the discoveries in Rosia Montana. But before this one find from Romania - for entire history - the only relevant specimens of Vivianite in Europe came from Trepca. And now I have to split in two categories: there were crystals up to 6cm from Trepca - dull, completely black, etched, all in all: large but ugly and only of relevance for the locality, but for sure not of interest for collectors with sense for aesthetic. And then we know crystals from 5 to about 20 or even 25mm; they showed good translucency; gemmy like crystals from Bolivia or Romania. And many of them really nice, with matrix and contrast. For Europe they were very, very good and eye-catching - they just didn´t reach the size of crystals from Bolivia, but quality was exceptional. Caused by their rarity and their relevance for Europe this stuff was - and still is - highly appreciated under collectors. One of the largest crystals from these gemmy ones was in the collection of the fabulous Herb Obboda - with a main crystal about 25mm. I nearly dropped over the floor when I saw this one - the crystal is in this very best quality we know from Trepca - and it is 43mm tall! It shows this wonderful contrast to matrix (which is the proof for the locality, it is the typically matrix for Trepca) and Siderite. 
With just a touch of backlight you can see the green to even blue internal color. The faces are all on highest possible luster and the end-points are sharp and lustrous, too. And there is one more amazing detail: attached to the front-side (lower half more to the left hand side) you can see four intense green, sharp Ludlamite crystals. This is - at first - a nice, eye-catching detail, but also a very rare combination, which makes this piece even more exceptional. I had a fist full of these gemmy Vivianites during the years, but the size of this one is phenomenal - of highest relevance for the locality!