Diamond Dreamstage Value Collection Topaz Firm Tight Top 7" Mattress
Dreamstage 2.0 Topaz all-foam mattress with Cool Gel Swirl memory foam. 12-inch firm comfort. Gel Swirl cooling technology. Made in California. 20-year warranty.
or $13/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.
Gel Swirl cooling foam.
The Black Diamond Topaz is engineered around cooling. breathable knit cover, gel swirl cooling Cooling Bands, and gel swirl Memory Foam work in concert to actively remove body heat for 12+ hours. This is not passive cooling. It is active temperature regulation built into every layer. Available as a hybrid mattress with Diamond\'s 7-Series Wrapped Coil System.
Gel Swirl Cooling Bands
Diamond's signature cooling technology. Advanced mineral bands actively draw excess body heat away from the sleep surface. Not a gel layer, not a phase-change cover. Active mineral-based heat removal that works for 12+ hours continuously.
Cool Gel Memory Foam
Gel-infused memory foam provides additional cooling beyond the copper infusion. The gel absorbs and distributes heat evenly across the sleep surface for consistent temperature regulation.
Cooling Performance
The gel swirl pattern maximizes cooling gel distribution material. Infused throughout the foam, it actively inhibits bacteria, mold, and mildew growth. This keeps the mattress fresher and cleaner over its lifespan without chemical treatments.
Gel Swirl cooling in every layer.
Diamond manufactures their own foams and coils in their Southern California factory. The Topaz uses gel swirl gel memory foam for natural cooling and cooling performance.
Knit Cover
Breathable knit cover for a comfortable sleep surface.
Comfort Foam Layer
A thin comfort foam layer provides surface cushioning on the firm tight-top.
Innerspring Support System
A durable innerspring coil system provides the firm foundation at this compact 7-inch profile.
Six models: All-Foam or Hybrid, three firmness levels.
The Topaz line offers each firmness in two constructions: All-Foam (13\") for deeper contouring, or Hybrid (14\") with pocketed coils for added support and airflow. All use Cool Gel Swirl memory foam.
Lucille Firm All-Foam — 7-8/10
Best for: Back/stomach sleepers
Firm gel swirl foam for deep contouring and body support.
Currently ViewingLucille Medium All-Foam — 5/10
Best for: All-position sleepers, couples
Balanced gel swirl foam for versatile all-foam comfort.
View Medium All-FoamLucille Plush All-Foam — 3-4/10
Best for: Side sleepers, pressure relief
Plush gel swirl foam for maximum contouring and pressure relief.
View Plush All-FoamUltra-value firm profile.
The Topaz Firm All-Foam is for sleepers who want copper-cooled all-foam comfort at a mid-range price point.
Budget Buyers
At $399 Queen, the Topaz is Diamond's most affordable mattress. Built in the same California factory as their premium lines with the same certifications and warranty.
Firm Preference
The 7-inch tight-top provides a firm, flat sleep surface. No plush cushioning, no memory foam sink. Direct support for back and stomach sleepers.
Guest Room / Kids Room
Real mattress quality for secondary bedrooms at a price that makes sense. CertiPUR-US certified foam, 20-year warranty.
Temporary / Rental Setup
Moving into a rental or temporary space? The Topaz delivers genuine quality at a price point that works for transitional situations.
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 Lucille 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 Diamond models in person side by side
- Expert sleep consultants who know gel swirl foam technology
- 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 Topaz models.
All Topaz models use Cool Gel Swirl memory foam. Choose All-Foam (13\") for deeper contouring or Hybrid (14\") for coil support. View all Diamond mattresses.
Topaz Firm All-Foam 7"
Firm gel swirl foam all-foam for back sleepers. gel swirl cooling + titanium foam + 7-Series coils.
Currently ViewingTopaz Firm All-Foam 7"
Balanced gel swirl foam all-foam for all positions. The most versatile Topaz.
View DetailsTopaz Firm All-Foam 7"
Plush gel swirl foam all-foam for side sleepers. Deep titanium foam contouring without overheating.
View DetailsTopaz vs. Clarity.
Diamond offers two natural latex collections. The Lucille is the premium flagship. The Diana offers natural latex at a slightly lower price point.
| Topaz Firm 7" | Topaz Firm Hybrid 14" | Topaz Firm Hybrid 14" | |
|---|---|---|---|
| Height | 7" | 14" | 15" |
| Firmness | Firm (7-8/10) | Medium (5/10) | Firm (7-8/10) |
| Technology | Copper Gel Foam | Copper Gel Foam | gel swirl cooling + Titanium |
| Cover | Breathable Knit | Breathable Knit | breathable knit Ultra Cool |
| Construction | All-Foam | Hybrid | Hybrid |
| Best For | Back sleepers, natural firm | All positions | Budget natural firm |
| Price (Queen) | $3,899 | $3,899 | $3,549 |
What sleepers are saying.
4.2 out of 5 · 49 verified reviews
It took a few weeks for me to really love it, but now I don’t think I could go back to my old mattress.
I was worried it might be too soft, but it’s actually perfect. It cradles my body while providing great support.
For the price, you’re getting luxury quality. Feels just as nice as those high-end mattresses in fancy hotels.
Super high-quality materials. Feels like a mattress from a luxury hotel! Definitely worth the investment.
Bought this for my guest room, but now I want it for myself! Everyone who sleeps on it says they love it.
