The back shows a Christmas star and some presents, to echo the verse, "Chill December brings the sleet, Blazing fire and Christmas treat". I think after the year we have all been through, a Christmas treat will be very welcome.
The gemstones also echo the wintry tones, with rutile quartz, white moonstone, rainbow moonstone, amazonite, sky blue apatite, tanzanite (also a birthstone for December) and black snowflake obsidian. The charm is a piece of turquoise.
Here is a photo of all the cards together - not the best quality photo, but you can just about see them all.
Here's the backs of the cards. It was a lovely project to do and I now have a set of decorations for my seasonal tree which I shall use every year, with great pleasure.Edited to add:
Amanda asked whether I will display the ATCs and so, for her and any other interested parties, here is how they are displayed.
Here is my seasonal tree with its winter decorations, with the December ATC in the middle. The tree will get Christmas decorations on it briefly, but will then return to winter.














































