Very rare 3.9mm round genuine natural ruby gemstone

Product No: 1608rub0001
Stone Type: Natural Ruby
Shape: Round
Total Weight: 0.40 Carat
Size (mm): 3.9x3.9x2.8mm
Color: Red
Clarity: SI1
Luster: Very Good
Hardness: 9
Treatment: Only Heat
Origin: Mogok Burma