Green Aventurine and Lapis Lazuli are technically stones, not crystals. They still however have wonderful healing properties, so they’re lumped into the gemstone family.
Amethyst can be heat-treated to produce knock-off ‘Citrine’ but usually a trained eye can spot the difference.
Smokey quartz is excellent for new beginnings, balancing and grounding energies of the body. It’s also good for The Root Chakra, and improving connection to the physical world.
Carnelian is known to stimulate our lower three chakras and increase creativity, sexual energy and feelings of confidence. Carnelian is also good for increasing love, spontaneity and optimism.
Lapis Lazuli often has Calcite and Pyrite flakes throughout.