I learnt of Snow Rock Chonburi here: http://bk.asia-city.com/travel/news/magical-places-you-wont-believe-thailand and then found it's close to Grand Canyon Chonburi (upcoming post).
The one near Grand Canyon Chonburi is here:
13.3232714,100.9849764 = 13°19'23.8"N 100°59'05.9"E
but less impressive:
I was lucky that a fire cleared all the vegetation between Grand Canyon Chonburi and small Snow Rock Chonburi:
View of part of Grand Canyon Chonburi and Snow Rock Chonburi and Wat Nanthawan (green in the background, I have been before: http://christianpfc.blogspot.de/2013/12/wat-nanthawan-near-chonburi.html) from drone:
Armed with the impression from my visit to Grand Canyon Chonburi and small Snow Rock Chonburi, I checked on google maps (satellite and street view), and found the big one must be here: 13.3048402,100.9783856 = 13°18'17.4"N 100°58'42.2"E
from google maps street view
The blue signs say โางโม่หินพระเสริฐศิลา บริษัท บี.อาร์.เอ็นยิเนียริ่ง จำกัด (นามประเสริฐ) and ถนนส่วนบุคคล. "Prasert Sila Stonemill company B.R. Engineering limited" and "private property". But the fact that google street view cars went there shows that it's accessible to public. Will be back some day for the big Snow Rock Chonburi.
Copyright 2016 ChristianPFC except external pictures