The phrase "a small but fascinating" is correct and usable in written English.
It can be used to describe something that may be minor in size or significance but still holds an interesting or captivating quality.
Example: "The museum featured a small but fascinating exhibit on ancient tools that captivated visitors of all ages."
Alternatives: "a tiny yet intriguing" or "a modest yet captivating".
There is a small but fascinating exhibit about Petrosino up at the New York Police Museum.
Currently on view in the Rare Book and Manuscript Library is a small but fascinating exhibition of dice, from the Smith Collection of Mathematical Instruments.
These barracks at Four Four South have now been turned into shops, cafés and a small but fascinating museum that tells their stories.
The Heckscher is displaying a small but fascinating selection of pieces from the Kruithuis's holdings, focusing on mid-20th-century examples by nine modern European masters.
A small but fascinating section of the exhibition, "Living With Pop" (which is included in the impressive catalog that accompanies the show), is devoted to photographs of interiors of the era.
After a small but fascinating cluster of juvenilia the show covers Picasso's Rose and Blue periods, the monumental climb to Cubism and Cubist collage, and the return to neo-Classical figuration, almost always with freshly unfamiliar works.
Imagine being an art student in Paris in the 1880s — a flight of fancy made easier by a small but absolutely fascinating exhibition at the Princeton University Art Museum.
Juststrokerods is a smaller but equally fascinating, personally expressive instrument that Drummond described as "13 solid aluminum rods, justly tuned from pitches derived from a 31-tone source scale and covering one octave.
This project has not been exhibited in public since its 1970s heyday.A small but fascinating selection is now on show at the National Archives in Washington, DC.
The study is small but fascinating: taking photographs changes the way we experience the world, but reviewing them can change the way we remember the experience.
There is the small, but fascinating, fraction of the Tinder population that reflexively swipes right on every single recommendation without even looking at the potential suitor.
