In a Diamond's Glow

Year Published: 1967

Creator: De Beers

Description: This vintage film "In a Diamond's Glow" (1967) was produced for De Beers. It blends a romantic narrative with a technical documentary on the diamond industry. It traces the journey of a diamond from its geological formation millions of years ago to its role as a multigenerational family heirloom. The film features the Premiere Mine in South Africa (now known as the Cullinan Diamond Mine). The mine rose to prominence in 1905, when the Cullinan Diamond – the largest rough diamond of gem quality ever found – was discovered there.

0:00 — Main titles. The Romantic Hook: The film opens by paralleling the uniqueness of a diamond with the uniqueness of the woman who wears it.
1:25 — Jim and Sue: We meet a young couple. Jim arrives late to Sue’s birthday party, only to surprise her with an engagement ring. This sets the theme: the diamond as a symbol of blending futures.
3:40 — Geological Origins: A transition from romance to science. Diamonds were formed by extreme heat and pressure millions of years ago and brought to the surface by ancient volcanic outbursts.
4:10 — Deep Mining (The Premier Mine): In Africa, the Premier Mine has moved 200 million tons of "blue ground" since 1903 to recover 20,000 pounds of diamonds—a 20 milliontoone treasure hunt.
5:34 — Underground Crushing: Ore is blasted and then carried to underground crushers to be broken into manageable pieces before being sent to the surface.
6:15 — Coastal Mining (Alluvial Diamonds): The film explores mining along the African coast (Oranjemund). Over millions of years, rivers washed diamonds into the sea, which then deposited them on shores now buried under massive sand dunes.
8:03 — Precision Recovery: After giant machines move 15 million tons of sand a year, miners use brooms to handsweep the bedrock, finding diamonds hidden in tiny crannies.
9:21 — Historical Context: Diamond hunting is traced back to 800 BC in India.
10:13 — Industrial Screening: In modern desert plants, 85% of the material is discarded as waste.
11:47 — Breaking the Ore: To avoid shattering the diamonds, modern mills use force sufficient to break rock but gentle enough to leave the gems intact.
12:22 — The Grease Table: A highlight of the film explains a discovery from 1897: diamonds have a strange affinity for grease. Heavy concentrate is washed over greasecovered tables; the diamonds stick to the grease while all other rocks wash away.
14:12 — From Rough to Gem: As Jim and Sue marry, the film explains that rough diamonds look like lusterless pebbles.
15:08 — Sorting and Grading: Experts sort rough stones into over 1,000 categories based on color, clarity, and carat weight.
16:32 — Releasing the Brilliance: The film details the delicate process of diamond cutting:
Sawing (17:10): Using a paperthin bronze disc coated in diamond dust to cut across the grain.
Cleaving (18:06): Splitting the stone with the grain using a single, precise mallet tap.
Faceting (19:01): Polishing 58 facets onto the stone with minute accuracy to ensure the "inner fire" is released.
19:38 — The Passing of Time: A montage shows Jim and Sue's life—career raises, raising children, and growing old together.
20:19 — Jewelry Craftsmanship: The film highlights the artisans who design settings, combining precious metals with gems to create "wearable art."
23:00 — The Full Circle: Jim and Sue celebrate an anniversary. Jim gives her a diamond pin, and they discuss passing their jewelry down to the next generation.
24:30 — Conclusion: The film ends with the iconic slogan: "A Diamond is Forever."

Online Copy: https://www.youtube.com/watch?v=1VgSM7qs9_o

Metadata Source:YouTube