EVERYTHING YOU NEED TO KNOW ABOUT
NATURAL DIAMONDS
At Julie Sandlau, we work with natural diamonds guided by an uncompromising professional dedication, where precision, transparency, and respect for craftsmanship are fundamental values.
Each diamond is carefully selected and distinguished by its almost/near colorless grade, exceptional clarity, and a cut which makes a remarkable brilliance.
All Julie Sandlau jewelry is crafted at the family-owned factory in Vietnam, ensuring complete insight and control throughout the entire value chain — from the selection of gemstones to the finished, certified piece. This is your assurance of a creation where aesthetics, quality, and responsibility go hand in hand.
The four C's of Diamonds
C - CARAT
Carat refers to a diamond’s weight and is therefore also an indicator of its size.
One carat equals approximately 0.2 grams. In general, the higher the carat weight, the more valuable the diamond. However, a diamond’s price is always determined in combination with the other Cs. As a result, two diamonds of, for example, 0.50 ct can vary significantly in value depending on their color, clarity, and cut.
C - COLOR
White diamonds are evaluated based on their color, with the purest stones appearing completely colorless. The scale ranges from D to Z, with each grade reflecting how noticeable any color tint is:
- D–F: Colorless
- G–J: Near Colorless
- K–M: Faint
- N–R: Very Light
- S–Z: Light
The closer a diamond is to D, the purer and more desirable the stone appears.
C - CLARITY
Diamonds often contain microscopic inclusions formed as a natural part of the stone’s creation. Clarity is assessed according to an international grading scale:
- FL – Flawless: No imperfections
- IF – Internally Flawless: No visible inclusions
- VVS – Very Very Slightly Included: Extremely small inclusions
- VS – Very Slightly Included: Very small inclusions
- SI – Slightly Included: Small inclusions
- I – Included (also known as Piqué): Visible inclusions
Only diamonds in the I/Piqué category have inclusions that are visible to the naked eye. All other clarity grades require an experienced diamond grader and 10× magnification to be identified — serving as a reminder of just how refined and complex these natural gemstones truly are.
C - CUT
The cut is crucial to a diamond’s beauty, as it determines how light is reflected through the stone. Proportions, symmetry, and polish are evaluated together and classified according to the following scale:
- Excellent
- Very Good
- Good
- Fair
- Poor
An Excellent cut ensures optimal brilliance — the quality that allows a diamond to sparkle at its most intense. For this reason, we work exclusively with diamonds of Excellent cut, ensuring that every stone displays maximum light reflection, elegance, and quality.
HAND SET DIAMONDS
Each diamond is hand set by our skilled goldsmiths to ensure exceptional precision and enduring beauty.
This artisanal approach not only enhances the final expression, but also guarantees a level of quality and durability designed to be worn and cherished for generations.
The Responsible Jewellery Council
Our award-winning factory has been a member of the Responsible Jewellery Council (RJC) since 2019. As part of the Responsible Jewellery Initiative, this membership commits us to the highest standards of ethical responsibility, traceability, and integrity throughout our entire value chain.
RJC certification ensures that our jewelry is produced with respect for both people and the environment.
In addition, our factory is part of the Watch & Jewellery Initiative 2030, co-founded by Cartier and Kering. By joining this global sustainability partnership, we align ourselves with the industry’s shared commitment to responsible sourcing, climate action, and the protection of biodiversity. This further reinforces our dedication to creating jewelry that reflects both exceptional craftsmanship and a deeply rooted sense of responsibility.
