For over 7 years I have been looking around to find this symbol or what it may mean in connection with the question I asked (which was about my ancestry).
I just may have found a possible answer. I think it is a Tamgha, a clan or family symbol from the Altai or Kazakh region.
There are so many and most are not known or understood (ie nobody knows which clan or family they belonged to) because the information has been lost over time but they exist carved into rocks, as marks on the bottom of pottery, on coins, jewelry and brand marks on animals. Essentially they were boundary markers and ownership marks.
http://ru.m.wikipedia.org/wiki/Файл:Kazakh_Tamga_13.svg
http://kumukia.ru/article-8986.html
I have a lot more research to do yet but it's quite exciting.