The heptagram/septagram was chosen as I don't see it commonly applied to these brooches, though it has many associations which could be readily applied to Middle-earth lore.
For example, there is here a seven-pointed star within a seven-pointed star, and there are Fourteen Valar, with seven Lords and seven Ladies. Coincidence?
One might even ascribe a male/female aspect to these and their union as a single entity.
The seven-pointed star is also a common form for the badges of modern sheriffs and law-enforcement, and this too seems relevant to some of the ranger's work.
These are available for sale, though I post them here more for purposes of discussion than unabashed self-promotion.
![Image](https://i.etsystatic.com/15735208/r/il/e65aa7/1630736540/il_570xN.1630736540_q714.jpg)