Gyrolite on Prehnite Crystal | 102 gr | Mumbai, India Belemnite or pinkish tint due to

or pinkish tint due to the presence of impurities

Prehnite forms in cavities in basaltic lavas

it can also occur in shades of yellow

Size:  21 - 27 mm incl

Amethyst is a purple variety of quartz

Gyrolite on Prehnite Crystal | 102 gr | Mumbai, India Belemnite or pinkish tint due toGyrolite often forms nodular aggregates that can appear glassy, dull or even fibrous. The aggregate nodules often accompany many fine and rare minerals such as Apophyllite and Okenite plus many of the Zeolites. Looks very nice on Prehnite! Prehnite can form prismatic, tabular, or pyramidal crystals, but usually occurs in botryoidal, reniform, stalactitic, granular, or compact habits. It is usually green in colour, but may be white, colourless, yellow,