Original verdict: Ben appreciated being able to choose a Diamond mattress by construction and then select a firmness. Of the four older hybrids tested, the Transformation’s microcoil layer stood out for its subtle contouring. This comparison describes the 2019 models, not a direct test of today’s lineup.
Diamond Mattress sent Yawnder four mattresses for the original review: Grateful, Intention, Faith and Transformation. Ben received each in medium firmness, giving him a consistent starting point for comparing their construction and feel. Diamond also offered other firmness choices at the time.
Four medium models, side by side
All four reviewed beds combined foam comfort layers with coil support and measured about 10 inches high according to the original article. The differences were in the upper materials, covers and, on the Transformation, an extra microcoil layer. Identical firmness labels did not make them feel identical.
How the original models differed
Grateful
The entry model used a stretch-knit cover, gel foam, a coil system and foam around the edge. It provided the baseline for the other three beds’ additional comfort materials.
Intention
The Intention added a convoluted foam layer beneath its cover. Ben photographed its edge and coil system. The peaks and valleys in the foam were part of the older design; material names and current models can change.
Faith
The Faith used a phase-change cover and a solid comfort-foam layer. Ben described it as cradling a little more than the Intention. A cool-to-the-touch cover does not guarantee a particular overnight temperature.
Transformation
The Transformation combined a phase-change cover and foam with an additional layer of microcoils. Ben noticed a subtle difference in contouring when lying across the bed and singled it out for people wanting pressure relief with a responsive feel.
Edge support and tradeoffs
Ben found the foam-encased edges supportive across the reviewed models. Edge feel varies by body size and position, so sit and lie near the perimeter when comparing a current mattress. His findings came from the medium samples; a plush or firm version could feel different.
The original review considered the beds good value for their construction at the prices offered then. Those prices and model specifications are historical, and a brief review cannot guarantee long-term durability.
Watch Ben’s original comparison
Shopping Diamond today
Diamond’s current range includes models such as Black Diamond and Flurry Lux. These are different products; the 2019 Grateful, Intention, Faith and Transformation findings should not be presented as direct tests of them.
Check current construction, firmness, delivery, trial and warranty terms with the seller. To compare Diamond models locally, contact Yawnder’s Encinitas showroom about current floor availability.
Frequently asked questions
Did Ben test all four models?
Yes. Diamond provided the four older mattresses, each in medium firmness, for the original review.
Which one had microcoils?
The reviewed Transformation included an additional microcoil layer above the main support system.
Do these findings apply to today’s Black Diamond?
Not automatically. It is a different model and should be evaluated on its own current construction and feel.
Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 84 hold a complete standardized record and 41 a partial standardized record.