Vril is a legendary substance that is used by the people known as the Vril-ya. It has the power to both destroy and to replenish life depending on the will of its wielder. It is also used as a power source for Vril-ya machinery and lighting. Vril, in its natural state, is a golden-orange colored crystal with multicolored impurities. The Vril-ya often mount Vril crystals on wands and staves for ease of use. Harnessing the power of the Vril takes great mental concentration and can lead to exhaustion or worse for untrained users. It can destroy like lightning or even heal the dying. Its powers seemingly know no bounds. When in use, it creates a glittery orange cloud with streams of yellow and white energy.
It is believed that in the subterranean Realm of the Vril-ya, resides the one and only source of all Vril in the world. A Vril Font provides the Vril-ya with the Vril in a liquid form which they can drink to infuse themselves with its powerful essence. The crystal outcroppings which surround the Font are used by the Vril-ya for more practical purposes.
I think this is the third or fourth concept render of Vril crystals. The glow seen is created both by rendering with IDL and some additional postwork in Photoshop. I like that the mostly golden-orange crystals have rainbow impurities in them which adds to their mystical beauty, I think.