Red plus yellow equals orange. .

Red plus blue equals purple.

Yellow plus blue equals green.

That is, orange can be rewarded by inserting red and yellow.

Purple inserted in red and blue can be rewarded.

Green inserted in yellow and blue can be rewarded.

And prismatic gems can be rewarded no matter what color they are inserted in the hole.

Prismatic holes can also be inlaid with gems of any color. Prismatic holes are extra holes without rewards. . Insert casually

You can set gems directly in any color, but if there is no slot reward, it depends on your choice.

The above are common gem holes.

Moreover, colorful gems can only be inserted into colorful grooves, and gears can only be inserted into gear grooves. . This is a dead rule. .