A collector might strive for an example of each color variation. Color is usually thought of as only green but is actually fairly diverse and can be yellow, pink, white, violet, orange and brown. Luster is vitreous. Crystals of any size are rare, usually microscopic interlocking crystal masses. Also as granules in metamorphic rocks.
Fracture is splintery to uneven.
Hardness is 6.5 - 7. Streak is white. Associated Minerals are quartz , serpentine , lawsaonite and aragonite . Best Field Indicators are toughness, typical green color, density, flame test and hardness.