What material is being used on a Rolex Day Date?

From someone saying whatever you can see on the Rolex Day Date is Gold

Meaning that say for a Rolex 1803, the case is Yellow 18KT old, The bracelet, the watch locking pins, the screws, the hour index, hour, minutes and second pointers is also made with 18KT yellow Gold

How about a 18049 White Gold Day Day?

Meaning that say the case is 18KT white gold, the bracelet, the watch locking pins, the screws, the hour index, hour, minute and second pointers is also made with 18KT white Gold.

How about a Platinum 118206 Day Date?

The case is 950 Platinum, the bracelet, the watch locking pins, the screws, the hour index, hour, minutes and second pointers is also made with platinum.

Someone has commented that even from Rolex Dealer saying that only 18 KT White Gold is being used on the hour, Minute and second pointers, not Platinum!

I need an Answer as there is no way for me to check unless I take such an Expensive Watch to the lab and use EDAX to check the material… Ref 118206 is listed at HKD$430,000!

HK Watch Fever
HK Snob
Hi Fi Fever