RIYADH, 17 September — Saudi Arabia has organized for Oct. 7-11 two exhibitions on construction and Saudi stone. More than 500 companies from over 20 countries will take part. The exhibitions will display construction materials and techniques, natural and artificial stones, environment-friendly Techniques and engineering services. Muhammad Al-Husseini, public relations director at Riyadh International Exhibitions Company, told Kuwaiti news agency yesterday that the exhibitions would display lights used in and outside houses, air conditions, water treatment equipment and tools for gardening. A Saudi study anticipated the increase of construction investments to $1.3 billion by the year 2005. (KUNA)