Complex sentence: Spectrolite is a less common variety of labradorite feldspar which exhibits a richer range of colours than labradorite (that shows only tones of blue-grey-green) and high labradoresence.
Split into simpler sentences: Spectrolite is a less common variety of labradorite feldspar. Spectrolite exhibits a richer range of colours than labradorite (that shows only tones of blue-grey-green) and high labradoresence.