Are all Gems female?

All Gems are genderless for the sake of convenience they take the form of female humanoids and use female pronouns. Steven Universe is the only male Gem only because he is an actual male.

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Keeping this in consideration, is rainbow quartz real?

Aqua Aura Quartz is a beautiful bright blue color, but this color is not natural. Other names for crystals treated so include; angel aura, flame aura, opal aura or rainbow quartz. Aqua aura is created in a vacuum chamber from quartz crystals and gold vapour by vapour deposition. Regarding this, what is sapphire's weapon? What is Sapphire's Weapon? Sapphire (other than our Homegirl Peri) is the only Crystal Gem that is non-fused that hasn't revealed her weapon yet. Pearl has a sphere, Amethyst has a whip, and Ruby has a gaunlet that doesn't look like Garnet's.

Who has Steven fused with?

In just this one hour, Steven fuses with Pearl to create a new form of Rainbow Quartz, the Pearl-Rose Quartz fusion briefly glimpsed back in the flashback episode "We Need To Talk;" Garnet, to create the fast-talking, meta-fictionally-aware Sunstone; and Garnet, Amethyst, and Pearl, to create Obsidian, an enormous What is Rainbow Quartz good for? Since ancient times, Rainbow Quartz has held special significance as it was believed to be a symbol for hope and positive energy. If you are someone who needs a fresh outlook on life then Rainbow Quartz is the perfect stone for you since it will suck away any negativity and replace it with positive energy.

And another question, what do rainbow crystals do?

A Rainbow crystal contains inclusions or internal cracks that show a rainbow when viewed from an angle. Rainbows are crystals of hidden joy, optimism, and understanding. They help us see the beauty in mundane things. They are useful in spiritual healing, meditation, and as talismans.