World Diamond Day made its debut on April 8, 2026, with a simple but ambitious idea: what happens if the diamond industry—long shaped by centralized messaging from De Beers, N.W. Ayer, and the Diamond Promotion Service (DPS)—pauses and speaks together, even if only for one day?
Originally developed by the World Diamond Heritage Board (WDHB) and now led by the Natural Diamond Council (NDC), the initiative centers on shared timing rather than strict messaging. According to trade coverage from JCK, Rapaport, and INSTORE, the format leans heavily on storytelling—inviting everyone from miners to retailers to post their own content using common themes and hashtags, rather than following a centralized campaign script.
In that sense, World Diamond Day is less about introducing a new message and more about testing coordination. The concept is decentralized, participation is voluntary, and the outcome depends entirely on whether the trade chooses to engage. Early guidance from the NDC encourages participants to focus on real stories—heirlooms, craftsmanship, origin—rather than overt promotion.
The Roskin Gem News Report marked the day as it happened.
On World Diamond Day, we shared a few of our favorite diamond images from our personal archive on LinkedIn, each one a reminder of why this category continues to matter—from historic blue diamonds to rare Argyle tender stones that define the most important—stones whose significance goes well beyond their estimated dollar value.
For now, April 8 marks the launch. The real story will be in what follows—how widely the trade engaged, what kind of content resonated, and whether World Diamond Day gains traction beyond its first year.
Here are the images we shared on the first World Diamond Day.
#1 – Of course, the first image of the day – the Hope Diamond
Thanks to Jeffrey Post, I was able to get up close to the unmounted Hope Diamond.
Chip Clark set the stage and the lighting. He took the glamour shot that is on the Smithsonian’s website. This is my shot, using my iPhone.
Photo by Gary Roskin
#2 – the Hope and Wittelsbach-Graff Diamonds.
Thanks again to Jeffrey Post who invited me to the Smithsonian where I was given the opportunity to photograph the unmounted Hope and Wittelsbach-Graff.
Chip Clark set up the stage and lighting for this shot. He took the professional glamour shot and I took out my iPhone and captured this.
and the Hope Diamond, 45.52 carats, Fancy Deep Grayish-Blue.
These are the two largest Fancy Deep Blue Diamonds in the world.
Photo by Gary Roskin
#3 – Having been to the Smithsonian several times, here is a look at the famous Portuguese Diamond on display … a 127.01 carat Asscher cut, with very strong blue fluorescence. I love the cut, and I love the fact you can see the fluorescence without using a UV torch.
127.01 carats, Asscher cut,
with very strong blue fluorescence
– so strong you can see the glow without a UV torch.
Photo by Gary Roskin
#4 – Using the Nikon Coolpix 995 in hotel lighting (incandescent ceiling spots, and natural daylight coming in from the windows… ugh…) and getting a shot of three Hero stones from the 2014, 30th Argyle Pink Diamonds Tender.
The Argyle Cardinal (center), 1.21 carats, Fancy Red, the Argyle Toki, 1.59 carats, Fancy Intense Purplish-Pink (right), and the Argyle Rosette (left), 2.17 carats, Fancy Intense Purple-Pink. (… an exceptional example of the range of “Fancy Intense” – left v. right.)
the Argyle Toki, 1.59 carats, Fancy Intense Purplish-Pink (right),
and the Argyle Rosette (left), 2.17 carats, Fancy Intense Purple-Pink.
(… an exceptional example of the range of “Fancy Intense”)
Photo by Gary Roskin
