Travertine. Help

[Pool cool]

Pool specs
Live in Houston
20000 gal
Pebble tec surface
Water chem normal
Water is supplied from a water softener home system

My problem:
I have travertine coping that is 3 years old and has lost its luster, it was not sealed after installation( 1st time pool owner and contractor did not recommend). The travertine in spots has white streaks but overall does not have the the glossy brown as when it was new. It looks great when it's wet..wish I could keep it that way. What can I do to get that look back

Thank you

[Stonemason123]

You can have the stone polished to smooth it out and brighten the finish. Then seal the coping.
Not hard to do but it is a dusty job and should be done by a pro.