I absolutely love sphene and bought a couple of pieces from Rocks & Co when they first started, when they were still cheap!
The Capelinha sphene on Rocks & Co now is way overpriced. They say it's because it has green tones which are more expensive, which is no dount true, but nothing like that expensive. I get the impression that they have just decided to hike the price sky-high and in effect create a market at that price-point for a gem which is not readily available set into jewellery eleswhere. Well, good luck to them; but I'm not buying it!!