Diamond Diana Medium Natural Latex Lux Euro Top 15.5" Mattress
Diamond Diana Medium natural latex mattress handcrafted in California. Organic cotton cover, natural wool comfort layers, and pocketed coil support. 15.5-inch euro top profile. 20-year warranty.
or $148/mo with 0% APR financing for 24 months
California-made since 1946.
Diamond Mattress is a 4th-generation family-owned manufacturer based in Southern California. They are one of the few mattress companies in America that makes their own coils, processes their own foams, and sews their own covers — all under one roof.
Vertically Integrated Manufacturing
Diamond makes their own pocketed coils, processes their own memory foam, and cuts and sews their own fabrics in-house. Most mattress brands outsource these components. Diamond controls quality at every stage of production.
Certified Clean Materials
GREENGUARD Gold, OEKO-TEX, CertiPUR-US, and ECO INSTITUT certified. Diamond uses REPREVE recycled fibers in select models. Every material is tested for chemical safety and environmental impact.
4th Generation Family Ownership
The Pennington family has owned and operated Diamond Mattress since 1946. Fourth-generation president Shaun Pennington leads a company that has never been sold to a conglomerate or private equity firm.
20-Year Warranty + 120-Night Trial
Diamond offers one of the longest warranties in the industry. Sleep on it for 120 nights. If you do not love it after 30 days, exchange it for a different Diamond model at no additional cost.
Why natural latex outperforms foam.
Natural Talalay latex is a fundamentally different material from memory foam. It is harvested from trees, not synthesized in a lab. It breathes, bounces, and lasts longer. The Diana is Diamond's flagship natural latex mattress.
Natural Talalay Latex
Harvested from rubber trees and processed using the Talalay method for consistent open-cell structure. Naturally hypoallergenic, antimicrobial, and resistant to dust mites. Lasts 15-20 years without developing the body impressions that shorten memory foam lifespan.
Sleeps Cooler Than Memory Foam
The open-cell structure of Talalay latex allows continuous airflow through the material. Unlike memory foam, which traps heat in its closed-cell structure, latex dissipates heat naturally. Combined with organic wool and cotton layers, the Diana sleeps noticeably cooler.
Responsive, Not Slow-Recovery
Latex bounces back immediately when you change position. Memory foam slowly conforms and slowly releases. If you move frequently during the night or dislike the sinking feeling of memory foam, latex provides cushioning without the trapped sensation.
Built from the ground up in Southern California.
Diamond manufactures their own coils, processes their own foams, and sews their own fabrics. Every component is made or finished under one roof in their Rancho Dominguez factory.
Organic Cotton Cover
A naturally breathable organic cotton cover with hand-stitched quilting. No synthetic fabrics against your skin. Diamond cuts and sews their own covers in their California factory.
Natural Wool Comfort Layer
A natural wool layer provides moisture-wicking and temperature regulation. Wool absorbs up to 30% of its weight in moisture without feeling damp, and naturally regulates temperature across seasons.
Natural Talalay Latex
Multiple layers of natural Talalay latex provide responsive, buoyant support. Natural latex layers configured for balanced comfort across all sleeping positions. The 15.5-inch profile provides a taller comfort zone than the Firm model.
Diamond Proprietary Pocketed Coils
Diamond is one of the few mattress companies that manufactures their own pocketed coils. Each coil is individually wrapped and zoned across the sleep surface for targeted support and motion isolation.
Reinforced Edge Support
High-density foam encasement around the perimeter provides edge-to-edge stability. Sit on the edge without sinking, and use the full sleep surface without roll-off.
Three heights, three comfort levels.
Every Diana shares the same natural latex, organic cotton cover, and natural wool. The three models differ in height, latex configuration, and comfort level.
Lucille Firm 14" — 7-8/10
Best for: Back sleepers, stomach sleepers, heavier sleepers (200+ lbs)
Flat, responsive support. You float on the surface rather than sinking into it. The latex pushes back against body weight.
View Firm 14"
Lucille Medium 15.5" — 5/10
Best for: Combination sleepers, couples, all-position sleepers
Balanced support and cushioning. Enough give for side sleeping, enough support for back sleeping. The most versatile Lucille.
Currently Viewing
Lucille Plush 16" — 3-4/10
Best for: Side sleepers, lighter sleepers, pressure-sensitive sleepers
Deep cushioning with responsive bounce. The latex cradles shoulders and hips without the slow-sinking feel of memory foam.
View Plush 16"Built for the natural sleeper.
The Diana Firm is for sleepers who want firm support from natural materials, not synthetic foams. If you value what goes into your mattress as much as how it feels, the Diana is built for you.
Combination Sleepers
The medium natural latex accommodates back, side, and stomach positions. Latex responds instantly to position changes, making it ideal for sleepers who shift throughout the night.
Couples
Medium is the universal compromise firmness. Diamond's pocketed coils provide excellent motion isolation, so partner movements stay on their side of the bed.
Natural Material Seekers
Natural latex, organic cotton, and natural wool throughout. No synthetic memory foam, no chemical off-gassing. GREENGUARD Gold and OEKO-TEX certified.
Hot Sleepers
Natural latex sleeps significantly cooler than memory foam. The open-cell structure allows continuous airflow. Combined with wool and cotton layers for natural temperature regulation.
From delivery to warranty.
Every purchase includes premium service. Diamond backs it with the longest warranty in our store.
Free White Glove Delivery
Free delivery to your room of choice anywhere in greater Los Angeles. Our team sets up your new mattress and removes your old one at no extra cost. Same-day delivery often available.
120-Night Comfort Exchange
Sleep on the Diana Firm for up to 120 nights. If it is not the right comfort level after 30 days, exchange it for a different Diamond model or exchange for a different model at no additional cost.
20-Year Manufacturer Warranty
Diamond Mattress offers an industry-leading 20-year warranty covering manufacturing defects. LA Mattress Store coordinates any warranty claims on your behalf.
Try it before you buy it.
Natural latex has a distinct feel that is best experienced in person. As an authorized Diamond Mattress dealer, we carry the full Lucille lineup in all five of our Los Angeles showrooms. Walk in, lie down on all three firmness levels, and take your time.
- Compare all three Lucille firmness levels side by side
- Expert sleep consultants who specialize in natural latex
- Price match guarantee on every Diamond Mattress model
- Free White Glove delivery, setup, and old mattress removal
- Same-day delivery available throughout Los Angeles
Shop all three firmness levels.
Every Lucille shares the same natural Talalay latex, organic cotton, and Diamond proprietary pocketed coils. View all Diamond mattresses.
Diana Firm 14"
Firm natural latex at the most accessible height. 14-inch euro top for back sleepers.
View DetailsDiana Medium 15.5"
Balanced natural latex comfort for all sleeping positions. The most versatile Lucille.
Currently ViewingDiana Plush 16"
Plush natural latex at 16 inches. The tallest Diana for maximum cushioning.
View DetailsLucille vs. Diana.
Diamond offers two natural latex collections. The Lucille is the premium flagship at $3,899 Queen. The Diana offers natural latex at $3,549 Queen with slightly different latex configurations.
| Diana Medium 15.5" | Diana Medium 15" | Lucille Medium 15" | |
|---|---|---|---|
| Height | 15.5" | 15" | 15" |
| Firmness | Firm (7-8/10) | Medium (5/10) | Firm (7-8/10) |
| Latex | Natural Talalay | Natural Talalay | Natural Latex |
| Cover | Organic Cotton | Organic Cotton | Organic Cotton |
| Warranty | 20 Years | 20 Years | 20 Years |
| Best For | All positions | All positions | Premium natural latex |
| Price (Queen) | $3,549 | $3,549 | $3,899 |
What sleepers are saying.
4.7 out of 5 · 44 verified reviews
If you're looking for a high-end feel at a reasonable price, this is it! The build quality is premium, and I sleep like a baby.
A little on the softer side, but still offers good support. If you love plush beds, this is a great pick.
The edge support could be a bit better, but overall, I have no complaints. It’s a solid mattress with great comfort.
This mattress is a dream! I finally wake up feeling refreshed and without any aches. The quality is outstanding!
If you’re a side sleeper, this is the one! My hips and shoulders feel great, and I wake up feeling well-rested.
or $148/mo with 0% APR financing for 24 months