Stones Of Barenziah (The Elder Scrolls 5: Skyrim)

Searched the whole forum,maybe blind,or the hands of W*NN are growing,but nothing anywhere about the stones not found.
For those who first hear about them tell:
According to legend, these stones (24 total) were in a powerful artifact thieves in the crown,the crown nopotom broke and the pieces scattered on the*th,and you have been assigned the mission to find these stones.Once you find the 1st fireplace,litite the thieves Guild (who knows where she is,my condolences( =) and talk with everyone,one of the thieves tells you the story and say that is ready to buy from you stones but ONLY when you collect them all.I opened the whole map,have climbed almost everywhere where only it is possible,but only found 6 diamonds stones.If someone has a map with the presence of stones and a detailed description please write in comments,I would be very grateful.
(If you have any questions not on the topic ask,I will be glad to help you(I have passed more than 150 quests) )