We Know Where Your Jewelry Comes From

Since 1981, we’ve been intentional about where our diamonds, gemstones, and metals come from. We partner with suppliers who share our commitment to fair labor, safe working conditions, and environmental responsibility. We comply with the Kimberley Process to ensure our diamonds are conflict-free. Because when a piece of jewelry marks a meaningful moment in your life, it should come with nothing to hide.

At Marks Jewelers, ethical sourcing isn’t a checkbox — it’s built into how we do business. Call or text our Montgomeryville team at (215) 362-7132 or our Mount Laurel team at (856) 678-0006 to learn more.

What Ethical Sourcing Actually Looks Like

Most jewelry shoppers assume their diamond’s journey starts at the store. In reality, a typical diamond passes through multiple layers of middlemen — rough diamond traders, polished diamond wholesalers, distributors — before it ever reaches a retail case. Each handoff adds markup. Each layer creates distance between the original source and the buyer. And at most retailers, there is no visibility into what happened before the diamond reached their showcase.

Marks Jewelers operates differently. As a diamond destination serving Montgomery County, Bucks County, and South Jersey since 1981, we have built direct relationships with original-source diamond partners — diamantaires who participate in rough tenders and siteholder programs and polish diamonds in their own facilities. We deal directly with the people who transform rough stones into polished diamonds, not with resellers of finished goods. That means greater accountability at every point in the supply chain, and better value for you.

Whether you’re shopping for an engagement ring in Montgomeryville, a custom piece in Mount Laurel, or a diamond for a milestone occasion anywhere in the Delaware Valley — you deserve to know where it comes from. We make that possible.

What We Offer

Direct Source Diamond Relationships

Marks Jewelers works with diamantaires who are siteholders or participants in original rough tender programs — the most elite tier of the global diamond supply chain. These partners polish diamonds in their own facilities, which means we deal directly with makers, not middlemen. The result is a shorter, more accountable routechain from mine to your finger.

No Polished Diamond Resellers

By eliminating the reseller layer entirely, Marks passes the savings directly to our clients. You get better diamond value because there is no additional profit margin built in for a middleman who added nothing to the stone. This is a structural advantage that chain stores and most independent jewelers simply cannot offer.

Custom Rough Diamond Commissioning

One of the rarest capabilities in jewelry retail: our direct source relationships allow us to view original rough diamonds and commission specific stones for individual clients. If you have a precise vision for your diamond, we can go further upstream than any chain store or online retailer — selecting from rough before the stone is even polished.

Lab-Grown Diamond Option — ReMARKable Designs

For clients who prefer to sidestep mining concerns entirely, our ReMARKable Designs collection offers certified lab-grown diamonds with identical physical and optical properties to mined stones. No mining. No ambiguity about the supply chain. We carry both natural and lab-grown options and present them honestly — the right choice is always yours to make.

How Marks Jewelers Evaluates Every Diamond Partner

Before we work with any diamond supplier, we conduct a rigorous evaluation process. This is not a formality — it is how we protect our clients and the reputation we have built over 40+ years serving the Delaware Valley.

1. Vendor Verification: Every partner must demonstrate siteholder status or documented participation in original rough tender programs.

2. Facility Confirmation: We verify that diamonds are polished in the vendor’s own facilities — not purchased from secondary polished markets.

3. Documentation Review: Kimberley Process documentation is reviewed as a baseline. Our own sourcing criteria are applied on top.

4. Gemological Review: Our five GIA Graduate Gemologists evaluate every stone for quality, origin documentation, and consistency with our standards.

5. Ongoing Accountability: Vendor relationships are ongoing, not transactional. Standards are maintained through continued partnership.

For clients who want to go a step further, we offer the ability to view original rough and commission stones directly — giving you a level of transparency and involvement that does not exist at any chain store or online retailer.

Why Choose Marks Jewelers

Delaware Valley families have trusted Marks Jewelers with their most important moments since 1981. Our 15,000 square foot Montgomeryville flagship is the Delaware Valley’s largest indoor jewelry shopping area, and our Mount Laurel location serves Burlington County and South Jersey with the same standards and expertise.

We have five GIA Graduate Gemologists on staff, 3,000+ five-star reviews, and 40+ years of direct relationships in the diamond industry that cannot be replicated by a chain store or online retailer. Our “inclusive, not exclusive” philosophy means every customer — regardless of budget — receives the same expertise, honesty, and respect.

We are jewelers, not jewelry resellers. That distinction starts with where our diamonds come from — and it runs through everything we do.

Frequently Asked Questions

Visit us in Montgomeryville or Mount Laurel and speak with one of our GIA-certified gemologists. We love talking about where diamonds come from and how we evaluate our partners — no sales pressure, just honest knowledge.
Yes. Our ReMARKable Designs collection features certified lab-grown diamonds with the same physical and optical properties as mined stones. For clients who prefer to avoid mining concerns entirely, it’s a genuine, beautiful option. We carry both natural and lab-grown diamonds and present them honestly — without pushing either direction.
Siteholders are among the most carefully vetted participants in the global diamond supply chain — granted direct access to the rough diamond supply by mining companies. Working with siteholder-connected partners means Marks operates closer to the original source than most jewelry retailers ever will.
In many cases, yes. Our direct relationships with original-source partners give us access to rough diamond origins that most retailers cannot provide. For clients who want maximum transparency, we can commission stones directly from original rough — so you know exactly where your diamond started.
The Kimberley Process is an international certification scheme that prevents conflict diamonds — rough diamonds used to fund armed conflict — from entering the market. Marks Jewelers complies fully with KP requirements and applies additional sourcing standards that go beyond what KP alone requires.
It means working directly with diamantaires who source and polish from original rough — no resellers, no middlemen. We apply our own evaluation criteria on top of Kimberley Process compliance, and every stone is reviewed by our GIA-certified gemologists before reaching our showroom.

Contact Us

Every diamond at Marks Jewelers starts with a relationship — one we have built and maintained with original-source partners over 40+ years. If you have questions about where your diamond comes from, how we evaluate our suppliers, or whether a lab-grown stone might be right for you, we’d love to talk. No pressure. Just honesty.

Call or text Montgomeryville at (215) 362-7132 or Mount Laurel at (856) 678-0006. Our diamond and jewelry experts are available day and night. Serving Montgomery County, Bucks County, Burlington County, and South Jersey since 1981.