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BBB Accredited Business since

United Diamond and Stone, Inc.

Phone: (530) 878-2440 Fax: (530) 878-8263 16788 Placer Hills Rd Ste C, Meadow Vista, CA 95722 View Additional Email Addresses

BBB Business Reviews may not be reproduced for sales or promotional purposes.


United Diamond and Stone has been in existence since 2004 and is located in the foothills of Auburn, California
United Diamond and Stone is a full line stocking distributor servicing the marble and granite fabrication industry.
United Diamond and Stone ships out UPS daily and delivers if salesperson is in your area when you need your products.
Our customer service is very familiar with the stone industry and will help in any way they can.

BBB Accreditation

A BBB Accredited Business since

BBB has determined that United Diamond and Stone, Inc. meets BBB accreditation standards, which include a commitment to make a good faith effort to resolve any consumer complaints. BBB Accredited Businesses pay a fee for accreditation review/monitoring and for support of BBB services to the public.

BBB accreditation does not mean that the business' products or services have been evaluated or endorsed by BBB, or that BBB has made a determination as to the business' product quality or competency in performing services.

Reason for Rating

BBB rating is based on 13 factors. Get the details about the factors considered.

Customer Complaints Summary

0 complaints closed with BBB in last 3 years | 0 closed in last 12 months
Complaint Type Total Closed Complaints
Advertising/Sales Issues 0
Billing/Collection Issues 0
Delivery Issues 0
Guarantee/Warranty Issues 0
Problems with Product/Service 0
Total Closed Complaints 0

Customer Reviews Summary Read customer reviews

0 Customer Reviews on United Diamond and Stone, Inc.
Customer Experience Total Customer Reviews
Positive Experience 0
Neutral Experience 0
Negative Experience 0
Total Customer Reviews 0

Additional Information

BBB file opened: December 03, 2010 Business started: 01/13/2004 in CA Business incorporated 01/13/2004 in CA
Type of Entity


Business Management
Mr. Darren Thomas, President Mrs. Tammie Thomas, CFO
Contact Information
Principal: Mr. Darren Thomas, President
Business Category

Concrete Breaking, Cutting, Sawing Pipe Bending & Fabricating Wholesalers & Distributors Saws Tools - Cutting Hardware - Wholesale & Manufacturers

Products & Services

United Diamond and Stone, Inc. offers the following product(s): Abrasive Technology , Akemi Epoxy & Polyesters , Marble & Granite Blades, Pearl Abrasive , Router bits & Corebits , Safety Supplies , Tenax Epoxy & Polyesters

Alternate Business Names
ADA Concrete Dome United Diamond and Stone
Products & Services

United Diamond and Stone, Inc specializes in tools for cutting, polishing, and grinding for granite and marble. United Diamond and Stone, Inc. also are distributors to the Stone Fabricator.


BBB Customer Review Rating plus BBB Rating Overview

BBB Customer Reviews Rating represents the customers opinions of the business. The Customer Review Rating is based on the number of positive, neutral and negative customer reviews posted that are calculated to produce a score.

Customer Review Experience Value
Positive Review 5 points per review
Neutral Review 3 points per review
Negative Review 1 point per review

BBB letter grades represent the BBB's opinion of the business. The BBB grade is based on BBB file information about the business. In some cases, a business' grade may be lowered if the BBB does not have sufficient information about the business despite BBB requests for that information from the business.

BBB Letter Grade Scale

BBB Rating Value
A+ 5
A 4.66
A- 4.33
B+ 4
B 3.66
B- 3.33
C+ 3
C 2.66
C- 2.33
D+ 2
D 1.66
D- 1.33
F 1
NR -----
Star Rating scale

  Average Score
5 stars 5.00
4.5 stars 4.50-4.99
4 stars 4.00-4.49
3.5 stars 3.50-3.99
3 stars 3.00-3.49
2.5 stars 2.50-2.99
2 stars 2.00-2.49
1.5 stars 1.50-1.99
1 star 0-1.49

BBB Customer Review Rating plus BBB Rating is not a guarantee of a business' reliability or performance, and BBB recommends that consumers consider a business' BBB Rating and Customer Review Rating in addition to all other available information about the business. If the BBB Rating is NR then only Customer Reviews are used for the Star Rating.