Collection of three stories.
The Long Warpath is a slightly different version of Cache from Outer Space as published in the 1965 Ace double book "Cache from Outer Space/The Celestial Blueprint".
The other two stories were first published in Fantastic Universe magazine.
"They Twinkled Like Jewels" Volume 1 #4 January 1954.
"Rastignac the Devil" Volume 1 #6 May 1954.
For "The Long Warpath" (a slightly different version of Cache from Outer Space) see here
For"They Twinkled Like Jewels" see here
and for "Rastignac the Devil" see here