Leading companies engaged in jewellery manufacturing and retail have noted a spiraling increase in their share prices, affected by positive buyer and investor sentiments, in the ongoing festive season of Dhanteras, Diwali and the upcoming wedding season in India, reports say. %% Within this basket, Rajesh Exports took the lead with a 33 percent jump in its stock prices, since the past 14 days. The company, being a leading entity manufacturing gold and diamond jewellery delves in both exports and retail. It attributes this rise to both a good festive demand and foreign institutional investment. %% Titan Industries, was another notable stock which spiraled 21 percent in the past two weeks. The price also peaked to a new level of Rs.3,878 in the intra-trading day tow days ago. Titan industries, delves in manufacturing and retail of jewellery (brand: Tanishq) and watches (brand: Titan). %% The companies are positive of meeting a good demand during the season time ahead.