Contained in the chests are 3 emeralds and 4 diamonds as well as a bunch of gold and miscellaneous other items. This is one of the fastest ways to get started with some good items if you use this seed. For you teleporters the coordinates are X: 186 Y: 54 Z: 282.
If you dig straight down below the pressure tile in the chest area of the pyramid you will fall into a ravine which is found at X: 186 Y: 21 Z: 284. There is actually a network of ravines down here with 2 or 3 going off in different directions. I found 2 surface diamonds at X: 222 Y: 16 Z: 289. And another 2 diamonds at X: 221 Y: 12 Z: 306. That makes a total of 8 diamonds without barely moving from the spawn point. Continue exploring in a different cave passage and you will find another 4 surface diamonds at X: 267 Y: 12 Z: 395.
Time to stop diamond hunting and start finding a couple more features in this seed. There is a cool hollow mountain at X: 480 Y: 78 Z: 434. It would be a nice place to build a super base.
An NPC village in the desert at X: 890 Y: 65 Z: 580. There is a blacksmiths chest in this village with a diamond and 3 obsidian blocks. And a short distance away is a second desert temple at X: 779 Y: 65 Z: 635. I stood on the pressure plate by mistake and blew it up, so the contents of these chests will remain a mystery….for now.