“ER” stands for Ernest Rubinstein on jewelry, it likely indicates that the piece was made by or designed by Ernest Rubinstein.

Ernest Rubinstein was a jewelry designer who worked primarily in the mid-20th century and was known for his bold, modernist designs. 

His pieces are highly sought after by collectors and enthusiasts of vintage and antique jewelry. If you have a piece of jewelry with “ER” stamped on it, it could be a valuable and unique piece worth researching further.

What Is It Worth?

Determining the value of a piece of jewelry with only the information that it is made by Ernest Rubinstein stamped on it can be difficult as there are many factors that can affect its value, such as the materials used, the condition, the design, and the current market demand for vintage jewelry.

It’s important to note that the value of a piece of jewelry can fluctuate over time and can be affected by various factors, such as market trends and changes in consumer demand.

Is It Of Good Quality?

The quality of a piece of jewelry depends on various factors, such as the materials used, the craftsmanship, and the overall design. 

However, if the jewelry was made or designed by Ernest Rubinstein, it is likely to be of good quality as he was known for his high standards of craftsmanship and attention to detail.

Conclusion

“ER” stamped on jewelry stands for Ernest Rubinstein, it indicates that the piece was made or designed by him. Ernest Rubinstein was a well-known jewelry designer who worked in the mid-20th century and was known for his bold and modernist designs. 

The value and quality of a jewelry piece with “ER” stamped on it depend on various factors such as materials used, craftsmanship, and overall design, and can be assessed by consulting with a professional appraiser or jeweler.

If you have any concerns about the worth or quality of your jewelry, you may want to consult with a professional jeweler who can provide you with more information and advice.