Mohs Hardness: 10 out of 10
Color: Diamonds on GIA's D to Z color scale range from colorless to pale yellow, brown or gray. (Diamonds occur in nearly all colors and are known as "fancy colored diamonds". i.e. Fancy yellow, brown, pink, blue, green, etc.)
Spectrum: Almost all near-colorless to light yellow diamonds show the “cape” line at 415.5 nm, along with weaker lines at 435 nm, 451 nm, 463 nm, and 478 nm. (Cooling the diamond with liquid nitrogen helps make its spectrum more visible.)
Fluorescence: Typically inert or weak to strong blue, but might fluoresce any color under LW and SW. LW response is usually stronger than, or equal to, SW.
SG: 3.52 (+/-0.10)