The authentic crystals are:

Red Agate

• A protective stone that shields from negative energies and helps with fears and anxiety
• Grounds and centers the energies of the Root Chakra for good health and connection with the physical body
• Gives determination, grounding and helps with survival in physical realms
• Strengthens consciousness, courage, strength, physical energy, luck and success
• A powerful protector of your aura

Red Aventurine

• Enhances creativity, prosperity, diffuses negativity, and balances male-female energies
• Helps to ground excess energies within the body
• Creates balance and harmony in the home, useful in dealing with overly-critical relatives
• Absorbs electromagnetic smog and other environmental pollutants
• Helps balance blood pressure, lower cholesterol, and burn fat
• Assists in the area of fertility, reproductive organ issues, cancer, and hormonal imbalances.

• Use a flexible or cloth measuring tape to measure your wrist size.
• If you prefer a looser fit, go down a 1/2 inch or more from your wrist measurement.
• For a snug fit, use your exact wrist measurement.
• If you don't have a flexible measuring tape, you can also use a piece of string or ribbon and measure it against a ruler.
• Keep in mind that the size of the beads (8mm in this case) and other details of the bracelet may also affect the fit.