Crushed Olive-Green Opal Chips from Madagascar, Pea-Sized Gravel (2mm-4mm)

Opal is a very common class of minerals that are well known for their brilliant flashy “fire.” However, most naturally-occurring opals are "common" opals, which come in a variety of colors and are generally opaque. This common olive-green opal is from Madagascar and has a beautiful earthy-green tone. Our coarse material is considered to be pea- sized gravel, ranging between 4 millimeters to 2 millimeters. Please see the corresponding sediment size chart.  Mineral Properties Mohs’s Hardness: 5 - 6.5 Specific Gravity (g/cm3): 1.98 - 2.50 Luster: Vitreous, Resinous Color: Olive Green Origin: Madagascar This product is not man-made, mixed with resin, dyed, or stabilized. Pictures are taken in full sun and material is dry. Size measurements are using the metric system (millimeters), including the metric ruler (cm/mm) as shown in the product photos.