These are Citrine tumblestones. Weighing between 6g & 10.5g per piece you will receive 1 random piece for your collection.
Citrine is said to attract wealth, prosperity, abundance and success. It can raises self-esteem and self-confidence & overall stimulate the brain. Citrine promotes motivation, activates creativity and encourages self-expression.
It is also used for enhancing concentration, releasing negative traits, depression, fears and phobias. It is an emotionally balancing and chalra clearing stone useful for all kinds of practices.