As an ex- installer , this is my 2 cents after studying your photo
This appears to be some type of composite one piece,pre sloped pan
In that back corner it appears the bottom corse of stones does not extend fully over the edge of the pan, looks like 1/8 grout line filled with grout. This being the case on the install ,there is now a grout filled void that will continually hold water.
You can try to dig that material out,dry it out ,and fill with waterproof type silicone,but I don't think you are fixing this without major demo and retile work
Best Regards
Scott Wilson 

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On Jan 15, 2018, at 4:08 PM, Stuart Rosen <mail@stoneshine.com> wrote:

Seems to me when this happens-white marbles get damp stained. I don't recall being able to fix many of these. Not  an easy fix-

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On Mon, Jan 15, 2018 at 5:48 PM, Tony Warney <tony@excelstoneandtilecare.com> wrote:
Hi Fred,
I have seen a few of these in the last couple of months. Some were new installations.
There did not appear to be any areas in the shower pan that were missing.
Just wondering what your thoughts are.
Thanks


On Mon, Jan 15, 2018 at 11:54 AM, Fred Hueston <fhueston@gmail.com> wrote:
Looks like the caulk failed...I would dry it out and recaulk.  Make sure it is dry before caulking.  I would place some air moverers in the room. It could take  a while to dry out. I dehumidifier would work faster.

On Mon, Jan 15, 2018 at 2:48 PM, Dan Brown <dan@vcleaning.com> wrote:
Hello Pros,

Anyone have experience in minimizing/removing the water damage in a shower like this?  We have dehu’s and poultice at our disposal, but want to offer the lady an assured fix.   
<image1.png>
Dan Brown
Victory Cleaning Systems

 
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