What is the appearance of the feldspar with gridlike white streaks?

The appearance of feldspar with gridlike white streaks is best described as resembling turquoise. This characteristic is specifically associated with certain varieties of feldspar, such as labradorite, which can exhibit a play of color and unique visual patterns similar to that of turquoise. The gridlike streaks can enhance the gem's visual appeal, lending it a distinctive look which can sometimes be reminiscent of the intricate patterns found in turquoise stones.

The other descriptions do not accurately capture the qualities of this feldspar. For example, calling it opaque and dull would not reflect the potential brilliance and play of color typical of certain feldspars. While bright and shiny could apply, it does not convey the unique patterning that characterizes this specific feldspar. Similarly, stating clear and colorless does not apply since the gridlike feature and other colors often dominate its appearance, distinguishing it from those characteristics.