With the reveal of the Astrologian job, its star globe and the divining deck, it seemed like a good time to revisit this thread.
It's feasible that the names and imagery of the divining cards, besides having references to the Twelve, may reference in-game constellations. The night sky does seem to have groups of large, bright stars which glow the same colors as elemental crystals, and the divining cards also match the six elements. Three of the cards are similar to real-world Zodiac signs: Balance/Libra, Ewer/Aquarius, Arrow/Sagittarius. Or am I seeing a pattern where there isn't one?