Choosing a custom engagement ring jeweler can be an exciting yet daunting task. An engagement ring is one of the most significant purchases you'll make in your life, so it's essential to choose the right jeweler. Here are some bullet points to consider when picking a custom engagement ring jeweler:

1. Research: Start by researching local jewelers and their reputation. Look for reviews online or ask for recommendations from family and friends. Your fine diamond jeweler must have an excellent reputation.

2. Expertise: Choose a jeweler with a proven track record of designing and crafting custom engagement rings, ask to see samples of his work. A jeweler with expertise in this area will help you create a unique and beautiful ring that reflects your style and personality.

3. Quality: Look for a jeweler who uses high-quality materials as well as quality tools. Take a look around in his room or workshop. Is it neat? Is it organized? Good jewelers are normally meticulous about their works space. 

4. Experience: An experienced jeweler has honed their skills and knowledge over time, allowing them to create exceptional pieces that are both beautiful and well-crafted. Look for a jeweler with years of experience in the industry, as this indicates they have a deep understanding of the materials they work with and the techniques required to create high-quality jewelry.

5. Price: Custom engagement rings and other fine jewelry projects can be expensive, so it's essential to choose a jeweler who offers pricing that suits your budget. 

6. Warranty and After-Sales Service: Look for a jeweler who offers a warranty on their work and provides after-sales service such as first time polish and prong tightening. 

7. Personal Connection: A good jeweler will make you feel comfortable and valued throughout the process. Choose a jeweler who makes an effort to build a personal connection with you and understands the importance of this significant purchase.

In conclusion, choosing the right custom engagement ring jeweler requires research, expertise, quality, communication, fair pricing, warranty and after-sales service, and a personal connection. By considering these factors, you can find a jeweler who will help you create a stunning and meaningful engagement ring that you'll cherish for a lifetime.