Here is my opinion: Move your settler SE on top of the gems. Settle on the gems and work any commerce tiles soon as you can and have a crack at getting polytheism first. I believe that you have a good chance at discovering Polytheism first because the game speed is on epic and you will have a bonus of at least 3 commerce per turn from worked tiles. You may even get lucky and find a hut granting fishing technology and work another 3 commerce from the lake. If you miss Hinduism, then get Judaism instead.
The short term gain of founding a religion (and the immediate gain of having an extra hammer in your city tile) may outweight the long term benefit of having a mine on top of the gems. You also get an extra forest to chop by not settling where you are or 1S.
On a side note: Moving SE on top of the hill will reveal a wider section of the surrounding area – allowing you an opportunity to make a more informed decision of where to place your starting city in case you see something better. The surrounding deciduous trees show that you not near the polar caps so there would still be room place a city to the North and South of your capital. The tile 2SW of your settler appears to be a jungle tile, so you are a north of the equator. I would move south anyway to grab more land towards the centre of the continent you are on.
The short term gain of founding a religion (and the immediate gain of having an extra hammer in your city tile) may outweight the long term benefit of having a mine on top of the gems. You also get an extra forest to chop by not settling where you are or 1S.
On a side note: Moving SE on top of the hill will reveal a wider section of the surrounding area – allowing you an opportunity to make a more informed decision of where to place your starting city in case you see something better. The surrounding deciduous trees show that you not near the polar caps so there would still be room place a city to the North and South of your capital. The tile 2SW of your settler appears to be a jungle tile, so you are a north of the equator. I would move south anyway to grab more land towards the centre of the continent you are on.