What Is An Old Mine Cut Diamond?

Welcome to our exploration into the enchanting world of diamonds. We're Siebke Hoyt, a family-owned and operated business founded in 1889, renowned for our deep-rooted history in the jewelry industry and exceptional service. With our friendly and knowledgeable staff, boasting an average tenure of eight years, we aim to enlighten you on the mesmerizing allure of Old Mine Cut diamonds.

Understanding Diamonds and Their Cuts

Diamonds are more than just precious stones; they're enduring symbols of love, commitment, and luxury. Part of their immense appeal lies in their cut. A diamond's cut can influence its brilliance, making each cut unique and desirable in its own way. Among the myriad of diamond cuts, the Old Mine Cut holds a special place in jewelry history for its distinctive charm and romantic appeal.

History of the Old Mine Cut

The Old Mine Cut originated in the late 17th century and was prevalent until the late 19th century. This cut encapsulates the skill and craftsmanship of diamond cutters of the era. It was named "Old Mine" as most diamonds of this period were sourced from the old mines of India and Brazil, before South Africa's diamond discovery.

Characteristics of Old Mine Cut Diamonds

Old Mine Cut diamonds have a distinct set of characteristics:

  • Shape and Cut: They possess a square shape with slightly rounded corners and a high crown, creating an antique, cushion-like appearance.
  • Unique Facet Structure: They feature a small table, a large culet, and 58 facets, which give them a distinctive "softer" sparkle compared to modern cuts.
  • Difference from Modern Cuts: Unlike the precision-cut diamonds of today, Old Mine Cut diamonds have a handcrafted appeal, each carrying a uniqueness attributed to the individual artisan's touch.

Identifying an Old Mine Cut Diamond

Identifying an Old Mine Cut diamond may seem challenging, but a keen eye will discern its classic charm:

  • Look for a square shape with gently rounded corners.
  • A higher crown and larger culet compared to modern cuts.
  • Old Mine Cut diamonds are typically found in vintage or antique jewelry pieces.
  • When in doubt, consult with our seasoned jewelry professionals at Siebke Hoyt who are well-versed in authenticating and appraising these vintage treasures.

The Value and Rarity of Old Mine Cut Diamonds

Old Mine Cut diamonds are a testament to a bygone era, making them exceptionally valuable and rare. Factors contributing to their worth include:

  • Historical and Aesthetic Value: They carry a rich history and offer a unique, vintage charm not found in modern cuts.
  • Rarity: As Old Mine Cut diamonds were handcrafted, each piece is unique, contributing to their rarity.
  • Investment Potential: Given their rarity and increasing demand among vintage jewelry enthusiasts, they can be a worthwhile investment.

Caring for Old Mine Cut Diamonds

Proper care ensures the longevity of these exquisite gems:

  • Cleaning: Gentle cleaning with a soft brush, warm water, and mild soap will maintain its brilliance.
  • Storage: Store separately to prevent scratches.
  • Repairs or Resetting: Consult with experienced jewelers like our team at Siebke Hoyt to ensure minimal impact on the original cut.


Old Mine Cut diamonds are timeless relics of a past era, carrying a charm and individuality that remains unparalleled. Embrace the allure of these gems that beautifully blend history with luxury.

At Siebke Hoyt, we're committed to helping you uncover the beauty of each unique piece, promising quality merchandise at a fair price. Feel free to contact us or book an appointment for further inquiries.