0.75 ct gem black opal 8x5x2.5mmUS$2,600.00 Out of stock SKU: A1904 Category: Black Opal Opal Specifications Additional information Weight 0.75 ct Dimensions 8 × 5 × 2.5 mm Body Tone Black N4 Predominant Colors Blue, Red Brightness B4 Very Bright Cut Oval Dome Medium Dome Product Enquiry