I believe Orthodox Muslim Men abhor Gold ornaments, however even the strictest among their rulers used Gold decoration liberally on their weapons of offense and state.
Tipu Sultan, in no respect a Non-Observant Muslim, used Gold on his swords and scabbard mounts very liberally. Check out:
http://www.stephenwoodresearch.com/port/tip01.htm
Another of Tipu's personal swords at the National Museum, Delhi dated 1790 A.D. uses Gold Hilt Damascening and again the blade is inscribed in Gold. See Page 40, Arms and Armour - E. Jaiwant Paul.
Similarly with Nadir Shah's Battle Axe in the same museum.
There are many more examples.
Nidhin Olikara