KARACHI (APP) - Gold further slipped by Rs 428 to close at Rs 48,857 per 10 grams in the local market Friday, as its international price dropped to $ 1,731 an ounce, market sources said. According to Karachi Sarafa Association official, tola (11.664 grams) price also decreased by Rs 500 to Rs 57,000. Silver closed lower at Rs 908.57 per 10 grams.