Helzberg Diamonds, located at 630 Old Country Road, Space #1145A, Garden City, NY 11530, offers an impressive array of engagement rings and exceptional customer service in Nassau County. Operating hours are as follows:

- Tuesday: 10:00 AM - 8:00 PM
- Wednesday: 10:00 AM - 8:00 PM
- Thursday: 10:00 AM - 8:00 PM
- Friday: 10:00 AM - 9:00 PM
- Saturday: 10:00 AM - 9:00 PM
- Sunday: 11:00 AM - 7:00 PM
- Monday: 10:00 AM - 8:00 PM

The store specializes in custom engagement ring creation, allowing customers to explore a unique selection of ethically sourced diamonds and personalized designs. Reviewers frequently mention the knowledgeable and friendly staff, including Mary and Mani, who assist clients in finding the perfect piece to match their vision and budget. The personalized consultation is lauded, giving customers a comprehensive understanding of their choices while ensuring a stress-free shopping experience.

Customer service is a significant highlight, with many praising the patience and expertise of the staff. Numerous reviews reflect satisfaction with the professional guidance provided throughout the buying process, resulting in a positive atmosphere. However, there are some negative sentiments surrounding delays in ring resizing and occasional miscommunication.

Overall Sentiment from Online Customer Reviews:
Positive: 85%
Neutral: 10%
Negative: 5%

Best Review: A reviewer noted the exceptional assistance from staff members Mary and Kevin, specifically highlighting their patience and expertise during the selection of engagement jewelry, which greatly enhanced the shopping experience.

Worst Review: One customer expressed frustration over special order delays and the erroneous crafting of their ring, leading to significant worry as their wedding date approached.

*For this overview, customer feedbacks were viewed on Yelp, Google, and Facebook.

Operating Hours:
- Tuesday: 10:00 AM - 8:00 PM
- Wednesday: 10:00 AM - 8:00 PM
- Thursday: 10:00 AM - 8:00 PM
- Friday: 10:00 AM - 9:00 PM
- Saturday: 10:00 AM - 9:00 PM
- Sunday: 11:00 AM - 7:00 PM
- Monday: 10:00 AM - 8:00 PM

Staff members mentioned include Mary and Mani.