I was disappointed that there is only mounting attachments to hang vertically... I was considering hanging them horizontally, but am concerned any type of attachment I would attempt to add will either crack the item or NOT hold securely & it would fall off...  Someone previously mentioned theirs appear to have dark marks (not intended OR added to enhance them) and this is the case with my order, as well.  They have a 'scraped' appearance.  I was looking forward to receiving them & they are nice.  But my 2 comments will require my correcting them before I will hang them.