high-grade
Of excellent quality
High-grade describes something of superior quality or at the upper end of a scale.
High-grade ore contains a high concentration of valuable minerals.
High-grade steel meets exacting standards.
In medicine, high-grade conditions are more severe or aggressive: high-grade fever, high-grade tumor.
The verb high-grade means to steal the best specimens, originally ore from a mine.
Higher in rank
- premiumAdded cost for better
- top-tierOf highest quality
- first-rateOf superior quality
- top-notchOf superior quality
exceptional · excellent · prime · choice · select · finest · best · top-quality
Metal-bearing rock
- assayCompositional evaluation procedure
- concentrationSustained single-minded attention
- extractionAct of removing
- depositPlace for safekeeping
vein · mineral · enrichment · sampling · cut-off · reserves · tonnage · yield
Purified or cultured
- pureUnmixed, without impurities
- unadulteratedCompletely unmixed, genuine
- uncontaminatedFree from impurities
- concentratedGathered or intensified
potent · undiluted · clean · pristine · certified · tested · standardized · assayed
Extracting metal from ore
- refiningRemoving unwanted elements
- processingSystematic operation on data
- leachingDissolving out by liquid
- roastingCooking with dry heat
calcination · precipitation · slag · tailings · concentrate · bullion · ingot · matte
Metallic combination
- stainlessFree from discoloration
- temperedStrengthened through heat treatment
- hardenedMade tough or unfeeling
- corrosion-resistantWithstands oxidation and decay
structural · chromium · nickel · molybdenum · heat-treated · forged · rolled · specification
superior
Higher in rank
- premiumAdded cost for better
- top-tierOf highest quality
- first-rateOf superior quality
top-notch · exceptional · excellent · prime · choice · select · finest · best · top-quality · superlative
ore
Metal-bearing rock
- assayCompositional evaluation procedure
- concentrationSustained single-minded attention
- extractionAct of removing
deposit · vein · mineral · enrichment · sampling · cut-off · reserves · tonnage · yield · purity
refined
Purified or cultured
- pureUnmixed, without impurities
- unadulteratedCompletely unmixed, genuine
- uncontaminatedFree from impurities
concentrated · potent · undiluted · clean · pristine · certified · tested · standardized · assayed
smelting
Extracting metal from ore
- refiningRemoving unwanted elements
- processingSystematic operation on data
- leachingDissolving out by liquid
roasting · calcination · precipitation · slag · tailings · concentrate · bullion · ingot · matte · flux
alloy
Metallic combination
- stainlessFree from discoloration
- temperedStrengthened through heat treatment
- hardenedMade tough or unfeeling
corrosion-resistant · structural · chromium · nickel · molybdenum · heat-treated · forged · rolled · specification · certification
- gold mininggold pan, pan, panning, nuggets, gold nugget
- ratingsA rating, rating, one star, five stars, rating scale
- medical adjectivessurgical, cardiac, orthopedic, malignant, respiratory
high-gradelow-grade
Of poor quality
low-quality · inferior · substandard · subpar · second-rate
high, grade, height, upgrade, gradual, degrade, downgrade, gradient, graduated