Creating antimatter is an incredibly challenging and expensive process. The exact cost of producing 1 gram of antimatter is difficult to determine precisely, as it depends on various factors such as the method of production, the technology involved, and the energy required. However, it can be estimated that the cost is extraordinarily high.
To give you an idea, the production of antimatter typically involves particle accelerators, which are complex and expensive machines. The process often requires significant amounts of energy to create and control antiparticles. Additionally, containing and storing antimatter is also extremely difficult due to its tendency to annihilate when it comes into contact with ordinary matter.
Currently, antimatter production is primarily limited to small quantities in specialized laboratories for scientific research purposes. The cost of producing even a minute amount of antimatter can be in the order of billions of dollars.
In summary, while it is challenging to provide an exact figure, the cost of creating 1 gram of antimatter would be prohibitively high and far beyond the reach of current technology and resources.