Maybe you spotted one you've never seen before, like the opalescent Blazing Star.
From the newsobserver.com
The surface of the material is opalescent, as though covered in a sheen of water.
From the independent.co.uk
When we all stood to leave, she gave me a present wrapped in opalescent paper.
From the washingtonpost.com
What is the best thread to use with opalescent pale glass seed beads please?
From the yallsjoynt.com
The tables are topped with an opalescent glass so they seem to almost glow.
From the sfgate.com
In 1912, 12 opalescent memorial windows were installed on the ground floor.
From the en.wikipedia.org
Opalescent Rose Show bowls are rarer than clear carnival glass colors.
From the kansas.com
Suede sent out models in pink, baby blue and opalescent white sheath dresses and gowns.
From the freep.com
Some of the castors contain amberina, satin, cobalt and opalescent glass.
From the post-gazette.com
More examples
Iridescent: having a play of lustrous rainbow colors; "an iridescent oil slick"; "nacreous (or pearlescent) clouds looking like mother-of-pearl"; "a milky opalescent (or opaline) luster"
Opalescence is a type of dichroism seen in highly dispersed systems with little opacity. The material appears yellowish-red in transmitted light and blue in the scattered light perpendicular to the transmitted light. The phenomenon is named after the appearance of opals.
Resembling an opal in play of colors; iridescent
Name of the texture of a type of art glass.
Exhibiting a milky iridescence like that of an opal
A semi-opaque glass of milky or marbleized appearance. It was used in the Victorian art glass work and in the "stained glass" windows and other glass decorative articles produced by Louis Comfort Tiffany. Today it is used extensively in Tiffany-style lamps and windows.
A visual phenomenon named for the appearance of opals, where a material appears to be different colors depending on the way light is hitting it. With an opal, it may appear to be many different shades of yellow, red, blue, green or purple when viewed from different angles.