Strong's defines chrusolithos as a gold or yellow-colored gemstone ("gold stone"). Thayer's lexicon says it is golden colored. All ten versions of Scripture used for comparison purposes in this series translate the word as "chrysolite."
The 1906 Jewish Encyclopedia states the following tradition regarding chrysolite's relationship with the Ark of the Covenant.
"Others said that there was in the Ark a figure of chrysolite or ruby with the head and tail of a shecat and with two wings. It would utter a moaning sound, and the Ark would rush toward the enemy with the Israelites following it. When it stayed, they stood and were at ease, and victory came" (article "Ark of the Covenant").
The Chrysolite's color of golden yellow was associated with the sun and Sunday. A donkey engraved on the gem gave the wearer the ability to predict the future. On the other hand, if a vulture was etched on the stone it gave the person who possessed it the power to control demons and the winds.
This gemstone was also though to dispel various "terrors" of the night but only if it was worn in a setting of gold (Curious Lore of Precious Stones, pages 66 - 67, 133).