The phrase "a valuable form" is correct and usable in written English.
You can use it when describing something that is considered important or beneficial in a particular context, such as art, communication, or methodology.
Example: "The artist believes that painting is a valuable form of self-expression that can convey emotions and ideas."
Alternatives: "an important type" or "a beneficial method".
But Mr. Smith said they were still a valuable form of relief.
Pork is among the world's most popular meats; in many places, pigs are a valuable form of currency.
The opportunity to connect with other families who have been through similar experiences can be a valuable form of support.
"Everything we produced, they turned into good meat". Pork is among the world's most popular meats; in many places, pigs are a valuable form of currency.
The help that these programs provide to neighborhoods in need -- and the renewed sense of purpose they offer to older Americans -- provide the opportunity for a valuable form of volunteerism, many officials say.
Prompted by some clever publicity work on Butler's part, the art-world sophisticates had bought the notion that crunching weights and striking poses was a valuable form of self-expression.
Lot 128 is an imperial snuffbox made of gold and nephrite (a less valuable form of jade) with a portrait miniature of Czar Nicholas II.
Meanwhile, refineries try to intensify their capacity and process the heaviest fractions of petroleum to turn them into a more valuable form.
If, as Hewitt and Rosy Greenlees, executive director of the Crafts Council both remark, Britain needs designers and manufacturers, then craft is a uniquely valuable form of three-dimensional learning.
They really do appreciate it, and even if your baby Spanish is nearly unintelligible (as is still sometimes the case with ours), the goodwill you create is itself a very valuable form of communication, and one that you'll never regret attempting.
Although air observation was not as vital to German operations because of their control of commanding ground, the speed by which reports from air observation could be delivered made it a most valuable form of liaison between the front line and higher commanders.
