colourless
It can occur in various colors
This is what caused the huge crater at Boxhole
They have a bright luster and a transparent to translucent appearance
Apophyllite and Prehnite Cluster Crystal | 104 grams | Mumbai, India SO24 Apophyllite colourlessPrehnite 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, or gray. It has a colourless streak. Prehnite is transparent to translucent, with a vitreous to pearly luster. Prehnite forms in cavities in basaltic lavas. Apophyllite is a mineral known for its distinctive crystal formations, often