boreas
"If it sounds good, it IS good." E.K.E.
That appears to be a diasa, a diamond bonded to a sapphire. You can see the bond line just beyond where the taper begins. It's sometimes quite hard to tell a nude from a diasa if the bond is done well, especially when the tip is polished afterward. It's my feeling that the difference between a nude and a diasa is so slight that non of us is likely to eve hear a difference.