Uvarovite: Emerald green
Jade (hardness: 6 Mohs)
Nephrite
Calcium magnesium silicate
Specific gravity: 2.9-3.1
White, deep green, creamy brown
Jadeite
Sodium aluminum silicate
Specific gravity: 3.1-3.5
White, leafy and blue green, emerald green, lavender, dark blue green and greenish black, deep emerald-green