據國際有色寶石協會4月報告報導,切割成方形的寶石需求繼續保持强勁,而尺寸2.5mm及以下的供應量亦充足;但協會指出,2.5～3.5mm的紅寶及某些類型的藍寶及綠寶卻是不足;而尺寸超過3.5mm的供應量更是非常有限。该協會又表示,瑞士珠寶及制表業對尺寸小的優質紅寶、綠寶及藍寶需求維特正常,另外,對于鑲嵌于指環中央的3～6克拉的寶石的需求亦頗大。 According to the April report of the International Colored Gem Society, the demand for cutting into square gems continues to be strong, while the supply of sizes 2.5 mm and below is also sufficient; however, the association pointed out that 2.5 to 3.5 mm rubies and some types of blue Po and Emerald is inadequate; while the size of more than 3.5mm supply is very limited. The association also said that Swiss jewelers and watchmakers need Vitreous for smaller, high-quality rubies, emeralds and sapphires, while there is also a huge demand for gems 3 to 6 carats embedded in the middle of the ring.