They broke due to atmospheric pressure and/or mid-air collisions

the first one is grey and second one is black

Product Type: Spinel Gemstone

Dimensions:  56x51x39 mm / 2

Color: Dark Red

Natural Beryl var. Emerald Crystal in Matrix | 205 gr | Brazil | SO24 Titanite They broke due to atmosphericThis is a beautiful green beryl emerald from Brazil. Naturally occurring beryl tends to form hexagonal crystals that can reach several meters in size if given the right conditions. Completely pure beryl will be transparent and colorless, while mineral impurities frequently tint the crystals color in most specimens. This specimen is in good condition. Would be a beautiful addition to any new or existing collection. Name: Beryl var. Emerald Crystal