Human: Generate for me a description of a religious scene inside a temple with an altar and a slab of polished basalt. Assistant: 
The central altar is austere, lacking the carvings found in other areas of the temple. No vipers coil along the sandstone walls, no elaborate paintings adorn the chamber. All attention is focused upon an upthrust slab of polished black basalt veined with a natural serpentine pattern of deep green olivine.