If you want to make money quick, start collecting Enchanted Amber as soon as you have access to the Butterfly Oracle. Then use your Jeweler to fashion it into Emerald and Amber Rings and Amber and Opal Rings. Myra will ask for these in abundance, and whatever she doesn't buy, there's a ready market for in Sea Trading.
The best way to collect Enchanted Amber (at least among the combinations of heroes that I have available to me) is to send Iris, DeepMane and Greenleaf to the Butterfly Oracle; they should bring one back every time. However, I realize that Iris and DeepMane were seasonal heroes, so not everyone will have them available. Thus the best combination of non-seasonal heroes to send would be Greenleaf, Tanya, and either Bayoo or Rill. Either of those combos should give you a roughly 73% chance. Send them out every hour, and you'll have a pile of amber in no time!
Maximum sale price in sea trading:
1,067 royal coin
Myra's purchase price:
I don't believe Myra purchases these.
Market where Myra purchases them:
How many fit per slot on sea trading ship:
First available at level:
Where to adventure to collect:
(Click on a place name to see the odds for each character to collect this item there)
Recipes using this item:
(Click on a building or recipe to learn more about it)