You know me, get a silly idea, gotta draw it!
These two smol gems are Silver and Gold! They're construction gems like Bismuth, but much smaller and lower ranking. Together, these two choose to stay in a permanent fusion known as Electrum. Even fused, they're still shorter than the average adult human.
At first, I thought maybe these gems should be defective and smaller than they should be, but on the other hand I think I'll go with this as their intended size, because I find the irony of two precious metals being so low-ranking as Gems to be amusing.
(Note: Silver is female, Gold is male, and Electrum is female)