Naturally she was tired after such a day, but he observed a further dimness about her, a kind of opaqueness, like that of a lamp whose light has been put out, and it afflicted him.
"The Pastor's Wife"
Elizabeth von Arnim
No one who has not seen a fog on the Banks can quite imagine its dense opaqueness.
"American Merchant Ships and Sailors"
Willis J. Abbot
The moonstone is another example of this peculiar feature which is possessed in a more or less degree by all the stones in the class of pellucid jewels, but no stone or gem can in any way even rival the curious mixture of opaqueness, translucency, silkiness, milkiness, fire, and the steadfast changeable and prismatic brilliance of colour of the precious opal.
"The Chemistry, Properties and Tests of Precious Stones"
John Mastin