Top Diamond Suppliers in New Jersey: Why Plumb Club Association Sets the Standard in the Jewelry Industry

 

Introduction: The Importance of Choosing the Right Diamond Supplier

When it comes to sourcing diamonds—whether you're a retailer, wholesaler, or manufacturer—the credibility and ethics of your diamond supplier are everything. New Jersey, a hub of jewelry excellence, is home to some of the most reputable names in the diamond industry. Among them stands the Plumb Club Association, a leader that bridges innovation, trust, and quality. This guide takes a deep dive into how Plumb Club members represent the gold standard in diamond supply.

Who Are Diamond Suppliers and Why Are They Crucial in the Jewelry Chain?

Diamond suppliers are the bridge between diamond manufacturers (who cut and polish raw diamonds) and retailers (who sell the final product to consumers). Their role includes:

  • Procuring rough or polished diamonds
  • Quality inspection and certification
  • Pricing transparency
  • Ensuring ethical sourcing (conflict-free diamonds)
  • Distribution to retail and design houses

A reliable supplier not only guarantees diamond quality but also impacts brand reputation, customer trust, and long-term success.

 Overview of the Diamond Industry in New Jersey

New Jersey has long been a significant player in the U.S. jewelry market. With proximity to New York's Diamond District and access to global trade routes, it serves as a prime location for:

  • International diamond importers
  • Regional wholesale and distribution
  • Jewelry design and manufacturing
  • Ethical and sustainable practices adoption

The Plumb Club, based in New Jersey, leverages this positioning to bring together vetted suppliers, designers, and thought leaders.

What Is the Plumb Club Association?The Plumb Club Association is a unique coalition of major jewelry and watch suppliers. Founded in 1983, its mission is to:

  • Promote ethical practices and trust in the industry

  • Provide educational resources to its members and retailers

  • Set new benchmarks in transparency and traceability

The association hosts annual events like JCK Las Vegas and offers members an unparalleled opportunity to showcase products, including diamonds, to global buyers.

Why It Matters:

If a diamond supplier is a Plumb Club member, you can be sure they meet strict industry standards in terms of sourcing, quality, ethics, and innovation.

Why Retailers and Jewelers Choose Plumb Club Members as Diamond SuppliersHere’s why retailers and jewelers turn to Plumb Club member suppliers:

a. Uncompromising Quality Standards

All diamonds are certified by recognized authorities (like GIA, IGI, HRD) and undergo multiple levels of quality control.

b. Ethical Sourcing

Members comply with the Kimberley Process Certification Scheme (KPCS) and often go beyond to ensure conflict-free and environmentally responsible sourcing.

c. Industry Education and Transparency

The Plumb Club provides ongoing education about diamond grading, trends, and sourcing—equipping members and their clients with updated knowledge.

d. Trend-Driven Collections

Members are always at the forefront of diamond trends—whether it’s fancy cuts, lab-grown diamonds, or sustainable luxury.

 Spotlight: Key Diamond Suppliers Among Plumb Club Members

1. Leo Schachter Diamonds

A pioneer in diamond innovation and branding, Leo Schachter has a global footprint with a focus on ideal-cut diamonds and ethical sourcing.

2. KP Sanghvi

With over 50 years in diamond manufacturing and supply, KP Sanghvi is known for their excellence in cut, clarity, and craftsmanship.

3. SDC Designs

Combining creativity and technology, SDC Designs delivers affordable luxury diamond jewelry to major retail chains.

Each of these companies demonstrates the strength of being associated with the Plumb Club.

What Sets Plumb Club Diamond Suppliers Apart from Others?Feature

Non-member Suppliers

Plumb Club Members

GIA/IGI Certification

Optional

Mandatory

Ethical Sourcing

Variable

Verified & Transparent

Retailer Education

Limited

Robust and Ongoing

Innovation in Design

Occasional

Continuous

Industry Events Presence

Limited

Major Player at JCK, etc.

This structured support system ensures retailers get diamonds they can confidently sell.

The Shift Toward Sustainability and Lab-Grown DiamondsMore consumers now prioritize sustainability. Plumb Club members are quick to adapt by offering:

  • Lab-grown diamonds certified for quality
  • Eco-friendly packaging
  • Traceability technologies like blockchain

Trend Alert: Many Plumb Club diamond suppliers now provide blockchain-traced diamonds—boosting consumer confidence in product authenticity.

Questions to Ask a Diamond Supplier (Checklist)Before partnering with any diamond supplier, especially for bulk orders, consider these key questions:

  • Are your diamonds certified? If so, by which lab?
  • Do you adhere to the Kimberley Process?
  • Can you provide documentation of supply chain ethics?
  • Do you offer return or replacement options for flawed stones?
  • Are your products insured during transit?
  • Do you offer lab-grown diamond options?

Plumb Club members have structured answers to all these, reflecting their professionalism.

How to Join or Connect with a Plumb Club Diamond Supplier

Retailers looking to work with top-tier suppliers can:

  • Visit https://plumbclub.com/members/
  • Filter suppliers by product type (diamond, fine jewelry, watches)
  • Directly contact trusted manufacturers and distributors
  • Attend Plumb Club events and exhibitions

Bonus: These events also offer trend showcases, networking, and marketing insights for jewelry businesses.

 Case Study: A Retailer’s Experience with a Plumb Club Diamond Supplier

Business Name: Diamond Dreams NYC

Challenge: Needed a reliable and ethical source for consistent diamond supply

Solution: Partnered with a Plumb Club member (KP Sanghvi)

Outcome:

  • Increased customer satisfaction
  • Improved brand image
  • 30% revenue growth within one year

This is just one of many stories where the Plumb Club proved to be a game-changer.

Common Mistakes Retailers Make When Choosing Diamond Suppliers

  • Choosing price over provenance
  • Ignoring certification or quality guarantees
  • Working with non-transparent or unverified vendors
  • Failing to inspect product batches regularly
  • Not staying updated on market trends and consumer preferences

Pro Tip: Working with Plumb Club members helps mitigate all these risks.

 Why New Jersey Is Becoming a Jewelry and Diamond Powerhouse

Aside from the Plumb Club's base, New Jersey attracts:

  • Direct access to NYC markets
  • Logistics infrastructure (ports, air freight, etc.)
  • Lower operational costs than Manhattan
  • A growing cluster of manufacturers, suppliers, and jewelers

This makes it a prime destination for jewelry businesses.

Conclusion: Trust Begins with the Right Supplier

When sourcing diamonds, you're not just buying a product—you're investing in trust, ethics, and long-term customer satisfaction. The Plumb Club Association in New Jersey offers a curated network of the best diamond suppliers in the world. Whether you're a small retailer or a major chain, working with Plumb Club members ensures transparency, quality, and peace of mind.


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