The Sweet Gem Berry is a crop that grows from a Rare Seed after 24 days. It is not considered a Fruit or Vegetable and thus cannot be used in a Keg or Preserves Jar. It also does not benefit from the Tiller profession. It can be purchased from the Traveling Cart for data-sort-value="3000"9,000–15,000g.
Rare Seeds can be purchased from the Traveling Cart for data-sort-value="1000">1,000g in Spring & Summer, or for data-sort-value="200"600–1,000g in any season. Rare Seeds can also be produced from a Sweet Gem Berry using the Seed Maker.
Since the Seed Maker creates an average of two seeds from one Sweet Gem Berry, and that only 97.5% of the time, and since a Sweet Gem Berry is worth at least data-sort-value="3000">3,000g (more if it's of advanced quality), each Rare Seed produced from the Seed Maker is created at a cost of at least data-sort-value="1500">1,500g (data-sort-value="3000">3,000g ÷ 2), perhaps as much as data-sort-value="2250">2,250g (data-sort-value="4500">4,500g ÷ 2). This makes the maximum price of data-sort-value="1000">1,000g at the Traveling Cart a much more profitable buy.