Here is the chart of the Runes/Carvings open at this time
The numbers on the above tree corresponds with the numbers on below chart.
This chart will be updated regularly to add any new runes.
These runes are given names in the Rune description, but these are effectively only "names".
If you, for example, unlock a 10% bakery rune, you'll get an EXTRA 10% trade points for EVERY prdduct made in that Bakery Trade.
If you unlock a 20%, you'll get an EXTRA 20% trade points for EVERY product made in that Trade. However, it does not add the bonus to an EATEN product.
The extra percentage shown on these trade runes is a % on the actual base recipe points. You can get to a MAXIMUM of 25% extra points with these 5 runes opened.
* Additional information about runes with multiple levels.
If the rune in the chart is stating 'Levels' you will always start on level 1 and can go up the levels for that rune. However, you only need 1 level to get past that rune to go further up the tree.
If a rune in the chart is stating 'Choose', you can choose which item you want in that rune. Again also 1 is needed to get further up the tree.
Source: Official Farmerama Forums
