it is when you can buy and sell the same function of one unit for a different form of one unit to achieve the same transaction.
Divisibility matters in that it can be standardized to the weights and purity of public minted grams or ounces and pegged to the value of my produce.
If ounces and grams are all pegged to spot, and publicly minted, they maintain their marketable value.
However, consumer preferences as to the divisibility of grams to ounces will be based on my supply of produce and the underlying price
"Let me issue and control a nation's money and I care not who writes the laws."
- Mayer Amschel Rothschild
"give me control of my own permaculture and I care a lot about what makes law"