Astrophyllite (K2NaFe2+7Ti2Si8O28(OH)4F) is a relatively new mineral in the history of discovery, being found in 1844. It has a pearly luster, typically is yellow-brown in color, has a hardness of 3, and is brittle. It belongs to the astrophyllite group. Nuummite ((Mg2)(Mg5)Si8O22(OH)) is a metamorphic rock with amphibole minerals, placing it in the Anthophyllite-Gedrite Series. It is almost exclusive to Greenland, with a Finnish locality. It is quite rare. It has a glossy luster, is black or gray in color, and has a hardness of 5.5-6. Arfvedsonite ([Na][Na2][Fe2+4Fe3+]Si8O22(OH)2) is named after Swedish chemist August Arfvedson. It is a black stone with a vitreous luster, has a hardness of 5-6, and belongs to the arfedsonite group.
At a superficial level, they all look relatively similar; dark in color, beautiful (usually vitreous or glossy) luster, and for all but two stones, a hardness between 5 and 6.
Astrophyllite group is relatively small. It is defined by common elements like sodium, iron, and silicon in similar quantities. The Anthophyllite-Gedrite series has (Mg2)(Mg5)Si8O22(OH) to (Mg2)(Mg3Al2)(Al2Si6O22)(OH)2.. The arfvedsonite group is defined by ANa2(Z2+4Fe3+}Si8O22(OH,F,Cl)2..
At a spiritual belief level, there are supposed differences between the three as well.
Astrophyllite is a source of great comfort and grounding when it comes to your bond with the Universe. There is a celestial rhythm that comes through the gemstone with ethereal potency and power. The more you work with it, the more riveting and beholden you become to its magnificent influence for your Astral power and awareness.
For those who work in the Arts of magic, Nuumite gemstone offers a wonderful energy that helps you connect to the Elemental forces within the Earth. It is a gemstone that promotes inner power, self-development of gifts, and recognizing a higher consciousness.
Arfvedsonite is a highly active gemstone that invigorates you from deep within the soul. Arfvedsonite encourages you to reach higher levels of success in life and will support you with positive energy from every angle. Working with Arfvedsonite affords you greater opportunities with enlightenment, understanding, spiritual wisdom and prosperity.