Dark red Travertine from Iran is best red Travertine of the world. It has very dark red color with direct veins and also has very small holes.
产自伊朗的暗红洞石是世界上最好的红洞石，具有非常鲜明的暗红色，带有笔直的纹理以及一些细小的孔。
2
The water vestige that that softly spreads to open, if adorn in the dark color veins of skirt Shan.
那淡淡的蔓延开的水迹，如绣在裙衫上的暗色纹理。
3
Each unit houses a near-infrared (NIR) LED and monochrome CCD camera sensor, so as the red pigment in blood (hemoglobin) absorbs NIR light, veins appear as dark lines on the resulting image.