Hey there, welcome at AT
hmm, great question! i never really studied this card precisely, so I'll just share what i know and hope it will help you to understand it better or maybe know where to look elsewhere for further studies
So we know that
Mercury is in the 3. decan of
Virgo. Mercury is one of the main alchemical substances while virgo represents alchemical process of distillation. Mercury represents air element, so it is kinda intriguing that Crowley uses air element for earth card... There will be many earth-air symbols on this card. I think what Crowley meant was illustrating the opposites of
Kether and
Malkuth. Since the card number is 10, we are situated in Malkuth and that is the reason why the bottom coin is the biggest of all... Interesting thing is that even though Thoth tarot is pretty contradictory, Crowley didnt see Kether and Malkuth as opposites but complements creating the universe... yes, Malkuth is the opposite of highest manifestation of God in Kether, but it also reflects the material reflection of this idea into a kingdom of earth. Since this is the last card closing Minor Arcana, we can say that this is the final manifestation of tree of life from Kether to Malkuth.
Good that you studied the basics of Tree of Life so that i dont have to explain myself much
When we look at the
Atzilah world, and the Kether place, we see the astrological symbol of Mercury again. At Binah and Chokmah, i see similar symbols. I assume they are some other derivations or sings for mercury (didn't find them). At
Binah instead of a cross, there is an arrow, which is only used in Mars (and Neptune too but that is different sign), and at
Chokmah there is a dot in the circle... in astrology a circle with a dot inside represents sun... so maybe you could look for some connections between Mercury, Mars & Sun... In Crowley notes, i only found that fused Mars and Mercury suggests demons Glasya-Labolas, Botis, Marax (or Morax) and fused sun and mercury represents demon Zagan. I think Crowley used astrological signs for Atzilah to express how perfect and complex this area is, that it is not possible for humans to understand the highest motives and not even touch them... therefore using symbols representing planets, he probably wanted to illustrate a parallel.. just like we will never be able to imagine the whole universe (not even understand it as we think), the same way we cannot imagine and understand Atzilah...
Now, we go through the Abyss to move onto
Beriah world. In this area, Crowley uses Hebrew.. Beriah reflects the highest understanding and wisdom possible to men rid of the flaws, subjective moods and illusions. Therefore i assume he used hebrew alphabet since language is a way of culture of humans, when they separated themselves from animals, and were able to learn and understand the main principles of life. why hebrew? cuz old hebrew consists of 22 letters, just like Major arcana, connects individual Sephirot and based on tree of life explains the laws of universe... In
Geburah place, we have hebrew letter
BET, Bet represents I. Magician. For me, Magician also represents ego and thats probably why Crowley used this for Geburah (which means severity). Cuz when we are controlled by our egos, we are highly destructive... At
Chesed i'm not really sure, but that letter looks to me as either
TET or
AYIN. It is a weird form of these letters. their normal form is very different, but they have some variations and this looks close to them.. Anyhoo, Tet is XI. Strength and Ayin XV. Devil... Both cards are pretty earthy and can be destructive... I think Crowley used these cards for Geburah and Chesed to show us that money is a good servant and bad master... if we use it to reach our ultimate illumination in life, we will be saved, but if we misuse it, these cards will come to control us... Magician, Strenght and/or Devil.. In
Tiphareth there is a latin word that consists of letters
Resh-Pe-Aleph-Lamed (from right to left) and they mean the name of archangel
"Raphael". What is funny that Crowley kinda "reinvented" archangels back in his days, and guess what.. Raphael represents color yellow (the color of pentacles here, color yellow is also color of mercury) and is in Qamea of Mercury.
MERCURY! Again! In Hebrew numbers Raphael is 200+80+1+30=311. You can find at various places that 311 is a number of Raphael...
Interesting exercise is that you can turn hebrew words and names into card spreads... Lamed-Aleph-Pe-Resh equals to Strength-Fool-Tower-Sun... Just like you would write Raphael in those funny hebrew letters, this is the way to write Raphael in "tarot" language..
http://img172.imagevenue.com/img.php?image=338959435_P1080133_122_518lo.JPG
You can study the spread, notice the similarities, differences, evolution... Notice how is the entire spread Reddish-Yellowish... Mercury element is grey,silverish... but Mercury planet is Reddish-Orange, Yellowish... so we're back at this card... Also latin numbers of these cards are 11+0+16+19. So the final quintessaince is 46... (Paroketh divides the tree of life with the veil of illusion into 6 upper objective sephiroth and 4 lower subjective sephiroth deceived by illusion)... I assume thats why Archangel is in Tiphareth here, at the 'self' center of being on a right path with the universe... to prevent illusions to cause harm at Geburah and Chesed... Moreover when you sum up 4+6= you get 10 again, which is 10 sephiroth and also number of this card... I dunno, other thoughts anyone maybe?
So now we pass through Paroketh and enter
Yezirah world. Here we have weird symbols... This is really not my area... Yezirah represents illusion and confusion and this is also me at this area
in Hod, there is hexagram (which represents fusing of male and female energy) and it is inside of hexagon... I dunno what kind of symbol hexagram inside of hexagon is but i assume it would have something in common with sacred geometry... At
Netzach there is a star with 8 edges... dunno what that means... At
Yesod there is a triangle... Upright triangle symbolizes male energy and in alchemy means fusion of 3 main elements - salt, sulfur and mercury... there are also some numbers written inside if you look at the actual card... I think it is 8, 69 (or 89, cant see), 280 (or 260), and 2080 i think... no idea here again...
Then we finally move onto the
Assiah world, which is
Malkuth
itself. I think the symbol here is
Caduceus and being in Malkuth could represent that the true fortune is when we are trully present and grounded in life without thinking into the future or past... When we are trully present in present moment and dont care about other coins or problems... Since this is malkuth, i guess it says we can reach this wisdom by believing in the tree of life or natural laws of life. I guess this image more talks about reaching fortune by accepting life as it is, living in the presence, being guided by the universe... its not that much as physical money, needs and demands as others assume... If the person focuses on money and materia itself, the they become too comfortable to change and evolve and the bad side of this image will arise... this card really talks about spiritual fortune rather than physical...
hope this helped...
let me know