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Diamond

All articles tagged with #diamond

science9 days ago•7 min saved

LLNL Laser Experiments Correct Diamond Melting Curves for Fusion and Planetary Science

Researchers at Lawrence Livermore National Laboratory (LLNL) have corrected long-standing errors in diamond melting temperature estimates by using laser-driven shock experiments. By blasting diamond samples and tracking the process with X-ray diffraction, they found previous theoretical and experimental data were off by hundreds of degrees. This updated data is critical for improving inertial confinement fusion (ICF) efficiency at the National Ignition Facility (NIF) and for modeling carbon behavior in ice giants like Neptune. While the findings do not impact magnetic confinement fusion for power generation, they significantly enhance our understanding of diamond under extreme planetary pressures.

via Hackaday|

#diamond #inertial-confinement-fusion #lawrence-livermore-national-laboratory

politics24 days ago•2 min saved

Federal Judge Refers Philly DA Krasner for Criminal Probe

A federal judge issued a 40-page memo recommending that Philadelphia District Attorney Larry Krasner and his top deputy Matthew Stiegler be referred to the U.S. Attorney’s Office for a potential criminal investigation, alleging they pressured prosecutors to lie in a 2009 murder case. Krasner disputes the findings and intends to appeal.

via 6abc Philadelphia|

#conviction-integrity-unit #diamond #doj

science26 days ago•142 min saved

Laser shocks revise diamond melting point, solving a decades-long discrepancy

Researchers used ultraviolet laser shock compression on tiny synthetic diamond plates, measuring changes in reflectivity and glow to map the diamond’s melting temperature with unprecedented precision. They found the melting point is more than 1,300°F (about 700°C) lower than previously thought, bringing it in line with theoretical predictions and resolving a long-standing gap between data and models. The findings have implications for nuclear fusion experiments that rely on diamond capsules and for understanding the interiors of ice giant planets like Uranus and Neptune, where diamond-like carbon behavior under extreme pressures may occur.

via Live Science|

#diamond #laser-shock-compression #melting-point

science1 month ago•7 min saved

Tennessee Grandfather Uncovers 2.29-Carat Yellow Diamond at Arkansas Park

A Tennessee grandfather visiting Crater of Diamonds State Park with his granddaughters found a 2.29-carat yellow diamond after about 30 minutes; park staff confirmed the gem, which he named the Sage Juniper Diamond, noting yellow stones are rare at the park. It was the third-largest diamond found there this year, with 351 diamonds registered in 2026; the park does not grade stones, and officials advised seeking a certified gemologist for appraisal.

via foxnews.com|

#arkansas #crater-of-diamonds-state-park #diamond

science1 month ago•5 min saved

Flexible Diamond Membranes Spark Piezoelectric Electricity

Researchers at the University of Hong Kong demonstrated that ultrathin, flexible polycrystalline diamond membranes generate a measurable piezoelectric voltage when bent, due to grain-boundary–induced polarization. This overturns a century-old belief that diamond cannot produce electricity and could enable self-powered sensors, tiny energy systems, and implantable medical devices, advancing diamond from passive support to active electrical material.

via Science Daily|

#diamond #energy-harvesting #materials-science

science1 month ago•3 min saved

Lab Replays Neptune’s Diamond Rain to Sharpen Fusion Power Prospects

Lawrence Livermore researchers used laser-driven shocks on tiny diamond samples to reproduce the extreme pressures and temperatures found deep in Neptune and Uranus, melting diamond while recording its atomic structure, temperature, density and reflectivity. The work suggests slower initial shocks could improve fuel compressibility and boost energy yield in inertial confinement fusion, offering new atomic-scale benchmarks for modeling ice-giant atmospheres and guiding fusion experiments.

via Gizmodo|

#diamond #fusion #high-pressure

entertainment1 month ago•14 min saved

Post Malone’s colossal engagement ring may fetch up to $2 million

Post Malone’s fiancée Christy Lee reportedly wears a jaw-dropping oval engagement ring that experts estimate at $1–$2 million, with the center stone ranging from 10–15 carats (potentially up to 17) and a distinctive old mine cut on a slim yellow-gold band.

via Page Six|

#christy-lee #diamond #engagement-ring

science1 month ago•6 min saved

Diamond Remains Diamond Under Extreme Shocks, Solving 20-Year Melting Mystery

Laser-driven shock experiments up to pressures beyond Neptune’s core show diamond melts without forming an intermediate phase, and melting temperatures now match quantum simulations—resolving a 20-year discrepancy. The results hint that slightly slower initial shocks could triple fusion energy gain in inertial confinement fusion and provide tighter constraints for modeling diamond rain in ice giants like Neptune and Uranus.

via Science Daily|

#diamond #high-pressure-physics #ice-giants

science1 month ago•26 min saved

Diamond Melts into Metallic Liquid Carbon at Sun-Heat Temperatures Under Planetary Pressures

Scientists at LLNL’s Omega laser facility squeezed synthetic diamonds to about one terapascal and temperatures around 7,300 kelvin, watching the crystal lattice vanish as the diamond melted into a dense, metallic liquid carbon with no intermediate phase. The result pins the melting temperature at ~7,300 K at 1 TPa, resolving a roughly 20-year discrepancy with simulations and confirming diamond’s melt into an electrically conducting carbon fluid under extreme conditions.

via ZME Science|

#carbon #diamond #high-pressure

science1 month ago•8 min saved

Diamond melts under extreme pressure, defying expected phase changes

Scientists used the OMEGA laser to shock tiny diamond samples to 0.6–1.8 terapascals, heating them to about 7,300 kelvin. They observed diamond melting directly into liquid carbon without forming the predicted BC8 phase, with the crystal lattice persisting until melting and a surprising density reversal where solid diamond becomes less dense than its liquid. The findings resolve earlier temperature discrepancies, align with theory, and have implications for inertial confinement fusion models and the study of planetary interiors.

via ScienceAlert|

#carbon #diamond #high-pressure

business3 months ago•16 min saved

How a Late-Night Tagline Turned Diamonds Into Forever

Frances Gerety, a 31-year-old copywriter at N.W. Ayer, reportedly penned De Beers’ tagline 'A Diamond Is Forever' in 1947, a four-word line that helped normalize diamonds as the symbol of eternal love and reshaped engagement norms across roughly 40 countries. The slogan ran from 1948 onward, reinforcing a marketing-driven idea of value (including the famous two-month-salary rule) and turning the diamond market into a multibillion-dollar industry, even as Gerety herself never married. The piece explores cognitive dissonance between the private life of a creator and the public impact of her work, and notes the line’s enduring presence in De Beers campaigns today.

via Silicon Canals|

#advertising #business #de-beers

entertainment4 months ago•16 min saved

Andy Garcia’s Diamond Shines at Cannes With 7-Minute Ovation

Andy Garcia’s neo-noir Diamond premiered out of competition at Cannes to a seven-minute standing ovation. Garcia directed, co-scored, and assembled a starry LA-set noir led by Vicky Krieps and Rosemarie DeWitt, with familiar names like Bill Murray, Dustin Hoffman, Brendan Fraser and Demián Bichir among the cast. Described as a love letter to Los Angeles and classic noir, the nearly 15-year-in-the-making project marks Garcia’s return behind the camera and a personal, emotional journey he shared on stage.

via Variety|

#andy-garcia #cannes-film-festival #diamond

science5 months ago•21 min saved

Acoustic Purcell boost pairs a diamond color center with a nanomechanical cavity

Researchers build a microwave‑frequency nanomechanical resonator around a single silicon‑vacancy center in diamond and use a co‑localized optical mode to access the excited state, observing an acoustic Purcell effect that speeds spin relaxation by ~10× when the qubit is in resonance with a 12 GHz mode, while also using the color center as a probe to map the device’s phonon spectrum up to 28 GHz, establishing a new control regime for quantum defects and paving the way for phonon‑based interconnects between memories and qubits.

via Nature|

#acoustic-purcell #diamond #nanomechanical-resonator

science6 months ago•31 min saved

Lab-made hexagonal diamond edges past regular diamond in hardness

Chinese researchers report synthesizing millimetre-sized bulk hexagonal diamond from oriented graphite under about 20 GPa and 1,300–1,900°C, with diffraction confirming a pure hexagonal carbon phase. They measured a hardness around 114 GPa, slightly higher than typical natural cubic diamond (~110 GPa), and highlight high thermal stability, addressing long-standing debate over hexagonal diamond and suggesting potential for advanced technological uses.

via Yahoo News Canada|

#carbon #diamond #hexagonal-diamond

science6 months ago•41 min saved

Lab-forged hexagonal diamond edges out natural diamond in hardness

Chinese researchers synthesized millimetre-sized, phase-pure hexagonal diamond in the lab by compressing highly ordered graphite between tungsten-carbide anvils at 20 gigapascals and heating to 1,300–1,900°C, yielding a material with about 114 gigapascals hardness—slightly tougher than natural cubic diamond—which could enable new technologies and settles long‑standing debates about the phase’s existence.

via Yahoo|

#carbon #diamond #hardness