In 珠霊祭の夜 (Tama Tamamatsuri No Yoru), roughly Night of the Pearl Festival, the players are buying and selling gems through a mancala mechanism.
Each player has a board divided into six sections, one for each of the colors of gems. On their turn, a player choose all of the cubes in one section, picks them up, and distributes them as in mancala.
The color of the space where the last cube is placed and the number of cubes there determines the actions a player may take. Specifically, the color of gem they can buy or sell and the maximum number they can buy or sell.
After the distribution occurs, a market adjustment card is triggered from a face up pool which likely adjusts the value of a single colored gem up one, but may trigger a more volatile move.
The game ends after a number of times through an event deck or when a player has accumulated a certain amount of money. The players each get the same number of turns and the one with the most money wins.