luster

The shards, or clasts, have a glassy luster, making them look a lot like obsidian, a glass formed from lava when it cools very quickly.

With moviegoing habits scrambled in the age of streaming, movie theaters have lost some of their luster as anchor tenants at shopping malls and other commercial centers.

The schedule will probably lessen the luster from the Clippers, who have won their last three games by an average of 34 points.

Like Casimiro, many are expats from the wreckage of iconic glossy magazines that lost luster in an era of consolidation, venture capitalism and attention spans deemed too short to consume anything but algorithmic candy.

For the N.B.A., cable channels like TNT have lost their luster.