Sapphire is an ink type in Lorcana that rewards careful setup with big payoffs, with its more expensive ink costs offering more impressive rewards

CATEGORY CARDSDECKS STARTER DECK -YELLOW Eustass"Captain"Kid- [ST-36] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK -RED/BLACK Sabo- [ST-35] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK -PURPLE Charlotte Katakuri- [ST-34] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK -BLUE Kuzan- [ST-33] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK -GREEN Roronoa Zoro- [ST-32] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK -RED Monkey.D.Luffy- [ST-31] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK EX -Luffy & Ace- [ST-30] Release Date MSRPUSD $19.99 CARDSDECKS STARTER DECK -Egghead- [ST-29] Release Date MSRPUSD $16.99 DECKS Learn Together Deck Set Release Date MSRPUSD $39.99 CARDSDECKS STARTER DECK -Ace & Newgate- [ST-22] Release Date MSRPUSD $16.99 CARDSDECKS STARTER DECK -GREEN/YELLOW Yamato- [ST-28] Release Date MSRPUSD $11.99 CARDSDECKS STARTER DECK -BLACK Marshall.D.Teach- [ST-27] Release Date MSRPUSD $11.99

Not all of them can be gems, but luckily, extras can be sold as bulk packages for some quick cash
Dark Ritual and Phyrexian Tower get your rocks and threats out a turn or two early, and the easiest cuts are the weakest lands and a filler creature or two you never miss
Outlaws, treasure, counters, one of effects, little goad, more