Gold extended its gain by adding another Rs 50 to Rs 30,090 per 10 grams today, mainly driven by a firm global trend and pick up in wedding season demand from local jewellers and retailers. While, silver slipped owing to speculative selling and lower industrial demand. Standard gold (99.5 per cent purity) rose by Rs 50 to close at Rs 30,090 per 10 grams from Monday's level of Rs 30,040.