These particular clusters are green apophyllite, known to be the rarest version that exists.
Apophyllite is one of my favourite underrated crystals for beginners. It's perfect for anybody looking to start working with their crown chakra. It opens our mind to accepting ancient knowledge and wisdom from energies we look to to guide us. It helps us to tap into our higher mind and see clearer, setting us on our paths for the future and working to become our best selves.
Dimensions:
A: 4 x 3cm
B: 3.1 x 2.9cm
C: 4 x 3.5cm
D: 3 x 3cm
E: 3.2 x 2.8cm
F: 4.4 x 3.5cm