Arch - strength, support, lightness and openness, rebirth: leaving the old behind and entering the new.  Often marks access into holy places.
Circle - unity, infinity, the universe, divinity, balance, stability and perfection
Cross - spirituality and healing.  the principal symbol of Christianity.  Traditionally used to mark Spanish cemeteries, the symbol evolved to represent danger/death, poison and pirates
Crescent - representing the moon, it symbolizes new beginnings, and making dreams into reality
Dove - Peace, hope, divine presence, the soul, freedom and grace.  In Christianity the Holy Spirit
Evil Eye - used for thousands of years in many cultures, the symbol is used to ward off evil.
Fish - abundance, flow, adaptability, feminine energy (water symbolism) In Christianity: faith, spiritual nourishment and protection (used secretly in early Christianity)
Gold - symbolizes the sun, wealth and power.  Success, warmth, strength and eternity.
Halo - divine light, protection and sacred presence
Hamsa - In Jewish and Islamic cultures represents protection against the evil eye and negative energies
Hand - strength, power, protection, generosity and giving a blessing
Heart - love, affection and the center of emotion
Horseshoe - good luck, protection, religion, magic, ward off bad luck, misfortune or evil
Infinity - Eternity.  Limitless connection and enduring love.
Lightening Bolt - speed, strength and danger, inner strength
Peace Sign - Peace not war. In the 50"s used in British anti-nuclear activism.  It was later adopted by anti-war movements
Pearls - Purity, feminine strength, inner beauty.  Very powerful symbolically.  Suffering transformed into beauty because they form around a grain of sand. 
Rainbow - signifies new beginnings, hope, the fulfillment of a dreams and the promise of prosperity
Safety Pin - Protection, resilience.  Holding together what matters.  Symbol of resistance: first in the 70's by the punk movement.  In 2016 it resurfaced ofas a symbol of safety and quiet resistance to rising nationalism.
Sharks Tooth - protective talismans, ward off evil spirits.  Sailors believed they would bring them good luck while traveling or fishing. Surfers wear them to protect from sharks or drowning.
Shell - protection and inner treasure.  Beauty shaped by time
Skull -  used to denote poisonous substances as a warning of danger.  Used by pirates
Snake - one of the oldest & most widespread mythological symbols representing fertility, transformation, healing, power, knowledge and protection
Star - guidance and protection,enlightenment and spirituality, energy and aspirations
Star of David - protection, divine connection, balance between heaven and earth. Sacred symbol of Judaism, but also carries universal symbolism of harmony and protection
Sterling Silver - represents the moon, embodying intuition, emotional balance, purity and feminie energy.  Protection from negative energy.
Triangle - power, stability, the Holy Trinity, and female reproduction
Wave - flow and renewal. Strength in motion.