Please note: Our image is an example of the crystal you have selected and ordered. You will receive a crystal of equal quality and size to the representation. For those crystals with significant colour variation, please send me a message as to any particular colour preference so that I can try and fulfil your request personally.
3cm spheres and loved by kids for its colour changing ability. 
Girasol (Blue Opal)
Source: Found throughout the world predominantly in Australia, Brazil, USA, Tanzania, Iceland, Mexico, Peru, UK, Canada, Honduras and Slovakia
Chakra: Third Eye
Zodiac: Taurus
General: The blue tinge to Girasol comes from aluminium.  In addition to carrying the generic properties of Opal, this visioning stone reveals solutions to present difficulties, especially where these arise from previously unvoiced causes.  Revealing hidden feelings and psychic impressions inadvertently received, it assists in recognising the deeper causes of discontent and strengthens psychic boundaries.  This stone identifies connections between souls, and shows how the potential of these can be maximised.  An emotional pacifier, it facilitates satisfying emotional needs and realigns your spiritual purpose.  Helpful when past-life experiences or injuries are affecting the present life, Girasol reprograms cellular memory and the etheric blueprint, allowing the physical body to release a condition.  An excellent stone for stimulating creativity, Girasol creates a quiet space in which to work and meditate.
Beneficial For: Claimed to be beneficial for - Panic, phobias, confidence, creativity, assimilation of iron, vision, hair loss, metabolism, menopause, Parkinson’s, infections, self-worth, fever, memory, purifying blood and kidneys, regulating insulin.1
Emotional Healing: It is claimed to calm fear, phobias and acute sensitivity to stimuli.  For city dwellers, two and four legged, to absorb excess noise, crowds and pollutions.
Practical Uses: A large crystal or a dish of tumblestones filters out ongoing worries and resentments.  Wear if you bring up past injustices, to speak softly but honestly from your heart.  Assists the other person to focus.
Workplace: An egg or sphere calms a workplace that encourages stress.  Hold and centre yourself to avoid making rash decisions by being swept along.2
References:
Judy Hall, “The Encyclopedia of Crystals”, Bounty Books, London, 2015
Cassandra Eason, “The Complete Crystal Handbook”, Sterling Publishing, New York, 2010