Calcite from India, locality help

I bought this calcite online, and I just received it in the mail. The piece comes from an old collection and the alleged locality on the card is Nasik but I suspect the piece is not from Nasik. The matrix is the classic green/gray basalt, covered with layers of tiny quartz, gyrolite balls and what maybe prehnite rosettes. There are also a few small brown calcites lurking under the prehenite/gyrolite layers. The calcite crystal is a twinned rhombohedron, about 4x3x3 cm, it is very gemmy and colorless, no brown parts or phantoms inside, and it sits on top of the prehnite, with a few gyrolites on it.
The combination and layering of minerals seem to match that of the quarries near Bombay described in the Indian Zeolites issue of Min. Rec., but I am not sure: according to that reference calcites from Bombay have a brown core, and this one does not, so I ask for confirmation or advice here. I have attached a few photos but the specimen can also be viewed in video here: [www.youtube.com]

The specimen is very distinctive and certainly from Malad, Ward 38, Mumbai (Bombay), Mumbai District (Bombay District), Maharashtra, India

[www.mindat.org]

Hope this helps.

Rock Currier
Crystals not pistols.

I agree with Rock. Not all the calcites from there have brown cores. I have one that is cloudy but no cores. Yours is exceptionally gemmy. Nice specimen.

regards,
stephanie

The dark spots are reflections from the matrix.

Thanks guys, as soon as I take some good photos of it I shall submit them.