Millers International Diamond Cutters in Portland, OR, operates as a family-run jeweler specializing in custom engagement ring creation and jewelry manufacturing. They are known for their exceptional customer service and ability to work closely with clients to fulfill unique designs and requirements. The store is situated at 534 SW 3rd Ave, Ste 100, Portland, OR 97204, and can be reached at (503) 706-0157. Operating hours are as follows:

| Day | Hours |
|-----------|---------------------|
| Monday | 10:00 AM - 7:00 PM |
| Tuesday | 10:00 AM - 7:00 PM |
| Wednesday | 10:00 AM - 7:00 PM |
| Thursday | 10:00 AM - 7:00 PM |
| Friday | 10:00 AM - 7:00 PM |
| Saturday | 10:00 AM - 5:00 PM |
| Sunday | Closed |

The business has collected 10 reviews, with a general atmosphere reflecting a mix of both positive and negative sentiments from customers.

Overall Sentiment from Online Customer Reviews:
Positive: 70%
Neutral: 20%
Negative: 10%

Customers frequently praise Millers International for their attentive service and the quality of their custom jewelry, highlighting the efforts of staff members like Justin and Doug. However, some reviews depict negative experiences with the owner, pointing to rudeness and unprofessional behavior in specific instances.

Best Review:
Marina noted that the team was enthusiastic and dedicated while helping her with a custom engagement ring. She appreciated their willingness to address her complex design and found the resulting ring to be beautiful and exceeding her expectations throughout the process.

Worst Review:
Mark reported an extremely negative encounter with the owner, mentioning rudeness and aggressive behavior when he attempted to return an item. He emphasized a lack of professionalism that made him feel unwelcome and dissatisfied with his experience.

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