The way the eye perceives light and colour is through vibrations. Like-coloured crystals will have a similar vibration frequency, and therefore similar healing properties. Different coloured crystals will also align with different chakras in the human energy system. Here is a brief guide to crystal and chakra colours.
Black - Root Chakra. It grounds and absorbs negative energy.
Red - Root Chakra. It grounds, warms, energizes and provides security.
Brown - Sacral Chakra. It grounds and balances as well as provides strength. Helps you connect to the natural world.
Orange - Sacral Chakra. Enhances creativity, aides in decision making and supports sexuality.
Yellow - Solar Plexus Chakra. Enhances self esteem, supports prosperity and abundance, and gives courage.
Green - Heart Chakra. Promotes health and wealth, allows for forgiveness and helps to foster kindness.
Pink - Heart Chakra. Promotes love, activates kindness and fosters forgiveness.
Blue - Throat Chakra. Aides in allowing you to speak your truth and express yourself. Calms criticism and promotes integrity.
Purple - Third Eye Chakra. The chakra of reasoning, intuition and higher self. Promotes better sleep as well as emotional intelligence.
White and Clear - Crown Chakra. Very high vibrating crystals. Promotes spirituality and enhances understanding of your higher self.
Multicoloured/ Rainbow - Excellent for aura cleansing and chakra balancing.