These items are useful as Feng Shui 'cures' that can be used to positively alter the energy in your home.
The Temple Lions are protectors at the entrance of your home, and the Amethyst Clusters are for creating a more positive energy in bedrooms.
Both of these 'cures' and are generally placed to overcome an offending issue, such as a negative door orientation or when the bedroom is in a negative area of the house.
If there is no offending issue then they act as an 'enhancement.'
Having a Feng Shui Consultation will determine which is required in your home and provide recommendations to overcome the problem.