Gem Stone King Review 2026: Birthstones, Lab Diamonds and a Code Worth Trying
Every family has that one drawer. Inside, wrapped in tissue, sits a ring someone's grandmother wore every day, or a pendant with a stone for the month a child was born. Nobody remembers what it cost. Everyone remembers who gave it.
Buying that kind of piece online is harder than it looks. Stone names blur together, "created" and "simulated" sound alike, and prices for what seems like the same ring can differ by hundreds of dollars. Gem Stone King sells exactly these pieces, from sterling silver birthstone jewelry to IGI-certified lab-grown diamond engagement rings. Olivia Reviews went through its catalog, listings and policies in October 2026 to explain what you are buying and how to pay less for it.
Quick take: Gem Stone King offers a very wide range at clear US prices, from about $80 for a sterling silver set to around $2,000 for a 1-carat-center lab-grown diamond ring. Standard US shipping is free, and the listing titles spell out metal, stone type, carat weight and grades. It ships only within the US, return postage is on you, and the warranty terms are thin on detail. In October 2026 the site was showing code OCT20 for 20% off select styles. See today's Gem Stone King deals before you buy.
Four generations in diamonds
The brand's Our Story page traces the family business to 1903, when Elyahu Holzer started trading diamonds in Antwerp, Belgium. His great-grandson, Nir Hollander, is now president and is described as a fourth-generation diamond merchant. Over the decades the family ran locations in New York, Belgium, Israel and Thailand. Nir's father, Charlie Hollander, moved to Israel in 1966 and exported diamonds to jewelry stores around the world, later launching the Charles Hollander Collection.
The internet changed the model. Gem Stone King says it now sells directly to consumers and describes itself as a leading online jeweler with more than 3,000,000 internet sales. Because it buys gems directly and controls production, the brand says, it can keep costs down. Its story page states that every piece is brand new and mainly manufactured in the United States, and the homepage describes the jewelry as crafted in New York City. Headquarters is listed at 555 Eighth Avenue in Manhattan, and customer service runs Monday to Friday, 9am to 5pm Eastern.
How to read a Gem Stone King listing
The product titles are long, but they carry the information you need. Look for four things:
- Metal: 925 sterling silver, gold-plated silver (for example 18K yellow gold plated silver), or solid 10K or 14K gold. Some pieces mix 925 silver with 10K gold.
- Stone type: a natural gem name such as "Blue Sapphire," a lab-made version such as "Blue Created Sapphire," moissanite, or lab-grown diamond. Lab-made and natural stones can sit side by side as options on the same listing at different prices.
- Weight and shape: total carat weight (cttw) and stone sizes in millimeters.
- Grades and certification: lab-grown diamond pieces often list color and clarity grades (for example D-E color, VS1-VS2 clarity) and IGI certification.
Five pieces from across the catalog
Prices are the USD prices on gemstoneking.com in October 2026, before any code.
Black Onyx Pendant and Earrings Set ($79.99)
This is one of the lowest-priced ways into the brand. The set pairs an oval black onyx pendant with matching earrings, 3.05 carats total weight, in 925 sterling silver with an 18-inch silver chain. Onyx is listed as a December birthstone on the site, which makes this an easy winter birthday gift.
3-Stone Birthstone Ring ($79.99 to $189.99)
This listing shows why reading the options matters. The ring is set in 18K yellow gold plated silver with an 8mm cushion center stone and two 5mm round side stones, and you choose the stone. Options include white moissanite, blue sapphire and blue created sapphire, among others, and the price moves from $79.99 to $189.99 depending on your pick. Sizes run from 5 to 9.
Garnet and Ethiopian Opal Pendant ($124.99)
One of a new run of multi-stone pendants, this January birthstone necklace combines red garnet with white Ethiopian opal, 2.85 carats total, in oval checkerboard cuts of 8x6mm, 7x5mm and 6x4mm. The setting mixes 925 silver with 10K yellow gold, and it comes with an 18-inch chain. Similar pendants exist for most months, many at $114.99 to $149.99.
Pink Tourmaline and Lab-Grown Diamond Drop Earrings ($254.99)
For solid gold at a moderate price, these drop dangle earrings set pink tourmaline (an October birthstone) with white lab-grown diamonds in 14K yellow gold. The listing gives 0.70 carats total weight, with round 4mm and 3mm stones. They suit an anniversary or a milestone birthday.
1.22 Cttw IGI Certified Lab-Grown Diamond Engagement Ring ($1,999.99)
At the top of this list, this 14K white gold engagement ring holds a 1.00-carat round lab-grown center diamond, 1.22 carats total, graded D-E color and VS1-VS2 clarity according to the title, with IGI certification. It is sold in sizes 5 to 9, and the listing includes a sample IGI certificate image so you can see what paperwork to expect.
→ Check the latest Gem Stone King coupon codes and deals
Price comparison
| Product | Price (Oct 2026) | Good for |
|---|---|---|
| Black Onyx Pendant and Earrings Set (925 silver) | $79.99 | December birthdays on a budget |
| 3-Stone Birthstone Ring (gold-plated silver) | $79.99–$189.99 | Promise or anniversary rings |
| 14K Gold Lab-Grown Diamond Stud Earrings | From $99.99 | Everyday studs in solid gold |
| Swiss Blue Topaz Pendant and Earrings Set (925 silver) | $99.99 | A ready-made gift set |
| Garnet and Ethiopian Opal Pendant | $124.99 | January birthday gifts |
| 14K Gold Peridot and Citrine Earrings | $199.99 | August birthdays |
| 14K Gold Pink Tourmaline and Lab Diamond Drops | $254.99 | October birthdays and milestones |
| 1.22 Cttw IGI Lab-Grown Engagement Ring | $1,999.99 | Couples wanting a graded 1-carat center |
Shipping, returns and warranty
Shipping. Online orders ship only to US addresses, not to APO/FPO addresses or abroad, and there is no pickup at headquarters. The shipping policy lists free standard shipping on every order (three to five business days), with express and next-day delivery free on orders of $99.99 and up. Next-day orders placed Monday to Friday before 5pm EDT arrive the next business day; Saturday orders before 1pm EDT arrive Monday. The homepage also advertises free two-day shipping with no minimum, so check which option checkout offers you. Orders above $300 need a signature.
Returns. The refund policy gives you 30 days from purchase. Jewelry must be unused, in its original condition and packaging, with proof of purchase. Gift cards cannot be returned. Approved refunds go back to the original payment method within seven to fourteen business days. Return shipping is paid by you and is non-refundable, and the brand recommends a trackable service for returns over $75.
Warranty. The homepage promises a Lifetime Warranty, but Olivia Reviews did not find detailed written terms on the site. Ask customer service what it covers before you rely on it.
Payment. Checkout accepts major cards plus Amazon Pay, Apple Pay, Google Pay, PayPal, Shop Pay and Venmo.
Weighing it up
What we like
- A family diamond business with a long, documented history
- A wide price range, from about $80 to engagement rings
- Detailed titles that name metal, stone type, carat weight and grades
- IGI certification on many lab-grown diamond pieces
- Free standard US shipping and fast options on larger orders
- A brand-published code on the site in October 2026
What to watch
- No international or military shipping
- Return postage is non-refundable and paid by the buyer
- Lifetime Warranty details are not published
- Natural, created and moissanite options on one listing are easy to mix up
- Very long titles make side-by-side comparison slow
Who it's for, and who should skip
Gem Stone King works well for gift buyers who want a birthstone piece for a specific month, couples comparing lab-grown diamond engagement rings by grade, and shoppers who want solid gold earrings at moderate prices. It also suits last-minute buyers in the US who can use next-day delivery on orders over $99.99.
Skip it if you live outside the US, you want a fully custom one-off design, or you need written warranty terms before buying. If you are set on a natural stone, double-check that the option you select does not say "created" or moissanite.
How to save at Gem Stone King
- Try code OCT20. On October 17, 2026, the banner at the top of gemstoneking.com read "20% OFF SELECT STYLES - USE CODE: OCT20." The site does not list which styles qualify, so enter it at checkout and confirm the discount appears before paying. Monthly codes like this usually change.
- Use the $99.99 line. Orders at or above $99.99 qualify for free express and next-day delivery under the shipping policy.
- Compare stone options. On listings like the 3-Stone ring, a created stone or moissanite can cost far less than the natural option.
- Choose silver or 10K for gifts. Sterling silver and silver-and-10K-gold pieces cost much less than 14K gold versions of similar designs.
Our Gem Stone King coupon page lists the newest code when this one changes.
Gem Stone King FAQ
What is the current Gem Stone King promo code?
In October 2026 the site banner showed OCT20 for 20% off select styles. Check that it applies to your piece in the cart.
Are Gem Stone King's lab-grown diamonds certified?
Many lab-grown pieces state IGI certification in the title along with color and clarity grades, such as the 1.22 cttw engagement ring above.
Does Gem Stone King ship outside the US?
No. It ships only to US addresses and does not ship to APO or FPO addresses.
Can I return a ring if it does not fit?
Returns are accepted within 30 days of purchase for unused items in original packaging with proof of purchase. You pay the return shipping, so confirm the ring size before ordering.
Final verdict
Gem Stone King is the kind of store that can fill that family drawer: a garnet pendant for a January baby, onyx for a December birthday, or a graded lab-grown diamond for a proposal. The catalog is huge and the titles are honest about what each stone is, as long as you read them slowly. Pick your metal and stone with care, try OCT20 while it lasts, and see today's Gem Stone King deals before you order.
→ Check the latest Gem Stone King coupon codes and deals
Olivia Reviews researched Gem Stone King using its official website, product listings and published policies in October 2026. We haven't personally tested these products. We may earn a commission when you buy through our links, at no extra cost to you.