The phrase "a magnificent array of" is correct and usable in written English.
It can be used to describe a large and impressive collection or variety of items, ideas, or experiences.
Example: "The exhibition featured a magnificent array of contemporary art pieces from various artists around the world."
Alternatives: "an impressive collection of" or "a stunning variety of".
They look like ordinary rocks at first, but when a black curtain is drawn and ultraviolet lamps are turned on, they glow in a magnificent array of colors.
For one thing, the explosive growth of the city in the 1920's bequeathed it a magnificent array of impressive Art Deco buildings, many of which are now attracting Internet and other information-oriented companies.
As I gazed at a shop window one day at a magnificent array of silver trinkets, I was approached by a young Iranian guy of about my age, who introduced himself as Ali.
It is one of the decorative wonders of Istanbul, sparkling with a magnificent array of true Iznik tiles, from the greatest period of the tile-maker's art: the rich red colours were perfected at this time, and then the recipe was lost.
The man found himself in an identical room with an identical banquet table laden with a magnificent array of foods.
He is thought to have been given a ship burial and interred amongst a magnificent array of personal treasures and symbols of regal power that were discovered under Mound 1 at Sutton Hoo, in Suffolk.
As well as the magnificent array of Habsburg palaces, theatres, museums and opera houses, a selection of more democratic buildings - such as the city hall, parliament and university - also sprang up around the Ring.
What matters is the magnificent array of Spanish paintings united in one building.
Just look at the magnificent array of choices laid out before the consumer.
In the middle of this magnificent array of plays and players, the Triple Crown of horse racing is unfolding.
To some visitors, the Morgan exhibition will be an archival array of magnificent objects and images created for visual delectation, but locked in an earlier age.
