Thanks Ray and GD! I'm glad ya like it!

Here's another chapter!
The two twins' hearts raced speedily. They examined the hole by standing by it. Garnet spoke and broke the exciting silence. "I can't believe we just did that... Wow!" she said unbelievingly, rubbing her eyes.
Amethyst smiled and hugged her sister. "
You did it, sis, well done!" she laughed, and patted her twin on the back.
Garnet, overwhelmed, smiled proudly, then said: "Come on, we might as well check it out!" she said happily, crouching over the recently opened hole.
"Alright then, go!!" Amethyst replied, pushing Garnet evily.
Garnet slipped and grabbed the opposite edge, her body curved like a bridge.
"Ya little nasty!" Garnet growled, snorting with laughter.
She grasped the grass firmly, and dropped her legs down the hole, she hung there stupidly. Amethyst let out a burst of laughter, and fell to the floor, giggling crazily.
Garnet clutched at the vines on the wall of the hole, and slowly clambered downwards, mud dropping from the edge of the gap.
"Geronimo!" Amethyst cried, vaulting downwards opposite Garnet.
They carefully made their way to the bottom, where it was pitch black.
Amethyst conjured a blue fireball, it brightened the room up quickly, and it traveled in front of them, as if to guide the way.
The dark room had strange tiles on the walls, and the floor was shiny and had black and white clay tiles.
The sisters looked around, the room was very big, so it was hard to see.
They found a short stairway, and there were shadows upon the far wall.
"I don't like the feel of this place, it's weeeeird!" Garnet whispered into Amethyst's ear, who shook her off.
Amethyst grabbed Garnet's arm and led her down the marble staircase.
When they reached the bottom, everything was clear. There was a stone plynth stood at the wall, Garnet shook from Amethyst's grip and ran towards the plynth. It had a black, shiny slab placed on its surface, and it too had a yellow symbol carved into it.
"Hey sis, come and look at this!" Garnet called to her sister, who jogged towards her, and looked at the symbol, she sighed.
"Another...?" She asked simply, placing her hand on it.
Garnet nodded, then tried to release some mana into it, nothing happened.
She tried again, ditto. She looked at it hopelessly.
Amethyst started to whistle loudly, then she spotted something flashing in the corner. "Garnet.. Look at that!" she shouted excitedly.
"Fireflies..." Garnet said dreamily.