These are lovely Indigo Gabbro tumble stones. They are a black and grey/blue mottled colour with a lovely Indigo colouring.Gabbro is a crystal that belongs to a group of dark igneous rock made of silicate that’s rich in iron and magnesium.Indigo Gabbro is a powerful crystal of knowledge and understanding. It is sometimes referred to as the ‘wise soul’ stone and is believed to aid our understanding of our inner-selves, our deep rooted feelings and our past. It helps us to deal with any issues or deep seated feelings and to live better and more enlightened lives.» Attributes of Indigo Gabbro Further Information