These are Citrine tumbles are the ones that started as amethyst and were cooked in kilns to change colour. They are cheaper than the rarer natural ones. These are a small size to can buy multiple to use in grids. Obviously size also helps effectiveness of the stone’s help.
You know they are heated as the crystals have a lot of milky white and the clear parts have burnt yellow colour so as you are cleansed so you are rooted to the earth. They help increase creativity, encourage sharing, and promote happiness. Main reason people buy is for Increased prosperity, self-esteem and confidence.
The citrine tumble can be worn in the pocket, spiral or a hemp necklace if you want to wear it. Many place them in their wallets to cleanse them and manifest money. Photo is a sample. Dimensions are a guide.