Bible.com Keep The Feast, day 23
Exodus 22-25; Psalms 6 and 146
[A]nd they saw God of Israel. There was under his feet as it were a pavement of sapphire stones, like the very heaven for clearness.
Somehow in all times I've read the book of Exodus, I never noticed this before. The elders of Israel see God. The best they can come up with to describe the experience is a paving of perfectly clear sapphires under His feet. And they don't die (in fact it says they dine (sorry, I couldn't resist)).