A Beginners "Comprehensive" Guide On Cardsmith and Their Rarity System
Rarity Listing:
Lowest rarity = Beryl ( with odds of 1 out of every 149 / a total of 149 cards in the set with the numbers 1 through 149 )
Example: 

Emerald pattern in the background of the card / design in the background = 1 through 99.

Garnet = 75 total cards with the design in the card itself.
Silver = 50 total cards.
Amethst = 49 total cards.
Opal = 45 total cards.
Jade = 45 total cards.
Ruby = 25 total cards.
Aquamrine = 15 total cards.
Gold = 10 total cards.
Sapphire = 5 total cards.
Onyx = 1 of 1. There will only ever exist one card like this. You have hit the hold grail my brutha.
What you'd want to look up to be able to find accurate pricing / listings:
Name of card > holo or non-foil > numerical value if you have a collectors card ( i.e Jamie Dimon RC 026/149 )
Reliable website for good / useful information on card and it's respective sold listings:
https://130point.com/sales/
Subreddit:
https://www.reddit.com/r/Currencytradingcards/
Link to post that helped me try and explain it:
https://www.reddit.com/r/Currencytradingcards/comments/1dh4tod/currency_series_3_official_checklist/