Turquoise

December in the northern hemisphere is deep winter onset, Sun moving through Sagittarius into Capricorn around December 21-22 (winter solstice). The shortest light of the year; the energetic emphasis is on completion, protection, and the still-point before the year turns. Multiple cross-traditions hold winter-solstice rituals here.

Turquoise is December's modern AGS birthstone and one of the oldest documented protection stones in human history. Judy Hall, in The Crystal Bible Vol 1, frames it as a cross-cultural protection stone, used across Egypt, Persia, China, Tibet, and Native American traditions for protection and wisdom. December's combined themes (winter solstice, year-end transitions, travel, family gatherings, vulnerability to grief or stress) all benefit from a protection-and-wisdom stone simultaneously. Robert Simmons presents Turquoise as a stone you keep on through uncertain stretches, the one you do not take off when you are not sure what is coming. That captures December's structural uncertainty: the year is closing but the next one hasn't started; the longest night is here but the light is about to turn. Turquoise holds the in-between. Care: Turquoise is one of the most care-sensitive stones in the catalog (water-unsafe, sun-fades, can become brittle); reserve it for protected jewelry settings or altar work, not water-elixir attempts.