Over the years I've done an extensive amount of work with the elements. This is a strand I made a month or so ago, representing 30 elements, grouped into six main categories. Each element is represented by 9 stone beads, and each 9 is separated from the next by brass spacers. The strand can be worn as a necklace, bracelet, belt, and/or displayed as a six-petaled rosette, as shown in the attachment below.
The following provides a closer look at each of the elements via links, and correspondences of the stones used to represent each element by category:
Soil – Mahogany Obsidian, Stone – Moss Jasper, Ore – Brass, Mineral – Yellow Crazy Lace Agate, Fossil – Red Coral
Exosphere – Clear Onyx, Sky – Rose Quartz, Wind – Nevada Jade, Thermal – Peridot, Gas – Smoky Quartz
Lightning – Labradorite, Flame – Gold-Painted Glass, Lava – Carnelian, Magma – Red Agate, Core – Tiger Iron
Cloud – White Crazy Lace Agate, Dew – Serpentine, Glacier – Howlite, River – Moss Agate, Ocean – Turquoise
Heart – Rhodonite, Mind – Rhyolite, Soul – Mother of Pearl, Blood – Garnet, Breath – Clear Fluorite
Sun – Citrine, Moon – Moonstone, Star – Clear Quartz, Planet – Bronze Freshwater Pearl, Space – Black Onyx