Applying a Solar Gem to an item in Minecraft Java grants that item the power to absorb sunlight and store it as energy. This stored energy can then be utilized to fuel various contraptions and mechanisms, such as Redstone circuits and machines, providing a renewable and sustainable source of power.
To apply a Solar Gem, simply hold the gem in your hand and right-click on the item you wish to enchant. The gem will then be consumed, and the item will gain the Solar Absorption enchantment. This enchantment has three levels, with each level increasing the amount of energy the item can store and the rate at which it absorbs sunlight.