Jewel of Mystery
- The Gem of Mystery is an energy stone from the Generation 1 continuity family.

The Gem of Mystery or Jewel of Mystery (神秘の宝玉 Shinpi no Hōgyoku) is a jewel holding great power that was left behind on the planet Zel Samine by the Lazalt aliens long ago.
Games
The Transformers (PS2)
The Lazalt Ruins in which the Gem of Mystery rested were discovered by the people of the Paradius solar system shortly before the arrival of the Transformers on Zel Samine. Both the Autobots and Decepticons figured the jewel was a good candidate for the Zel Quartz they were searching for and set out to get it. After a big clash over the jewel, the victorious party brought it back to base, where it was discovered that, no, the Gem of Mystery and the Zel Quartz were not the same. In case the Autobots got their hands on the jewel, they returned it to the Lazalt Ruins. In the other scenario, the Decepticons kept it. The Transformers
Notes
- An odd quirk of the English script has the Autobots consistently referring to the energy stone as "Jewel of Mystery" while the Decepticons consistently call it "Gem of Mystery".
- The Gem of Mystery understandably reminded Megatron of the Crystal of Power he had found on Earth years ago. Whether the resemblance is significant or not is unknown.

