Chapter 2616 — Customs Tariff Headings
Products classified under Tariff item 26.16
Acantite Flotation Concentrate
Acantite (Ag2S) flotation concentrate from Mexican silver mines, grading 500-800 oz/ton silver. This concentrate is a mineral product used in metallurgical extraction of silver, falling under tariff item 2616.10.00 for silver ores and concentrates.
2616.10.00Argentiferous Galena Concentrate
Flotation concentrate of argentiferous galena, where silver is disseminated in lead sulfide matrix with high lead assay. The concentrate is a key input for polymetallic smelting and is classified under heading 26.16 as a silver ore concentrate with lead content.
2616.10.00Argentite Ore
Argentite (Ag2S) is a primary silver sulfide ore mined from hydrothermal veins, containing 87% silver by weight. This ore is used for precious metal extraction and falls under tariff item 2616.10.00 as a silver ore.
2616.10.00Broken Hills Silver Ore
Native silver ore from the historic Broken Hills district in Nevada, assaying 400 g/mt Ag. It is an unbeneficiated silver ore with verified metal content, fitting the definition of ores under Chapter 26 Note 2 for metallurgical extraction.
2616.10.00Bromargyrite Ore
Bromargyrite (AgBr) is a secondary silver ore from arid oxidation zones with 70% Ag content. This ore is directly amenable to cyanide leaching without roasting, making it a valuable silver ore for metallurgical extraction, classified under tariff item 2616.10.00.
2616.10.00Cannington Silver Concentrate
High-grade silver-lead concentrate from the Cannington mine in Australia, assaying 600 g/mt silver. Despite the lead association, it is classified under 2616.10.00 because silver is the primary metal for recovery, as per the statistical notes.
2616.10.00Cerargyrite Silver Ore
Cerargyrite, or horn silver (AgCl), is a chloride silver ore found in oxidized zones of silver deposits with up to 75% silver content. This ore is crushed and leached for silver recovery, falling under tariff item 2616.10.00 for silver ores and concentrates.
2616.10.00Cerargyrite Silver Ore with Lead Impurities
Ore from cerargyrite (silver chloride) deposits containing lead impurities from associated minerals like galena. The ore is primarily for refining and is classified under heading 26.16 as a silver ore with lead content.
2616.10.00Cerro Rico Silver Ore
Silver ore from the Cerro Rico mine in Bolivia, containing approximately 200 grams of silver per metric ton. It is classified under 2616.10.00 due to its primary silver content as reported by assay, meeting the definition of silver ores.
2616.10.00Chalcopyrite-Silver Ore Concentrate
Concentrate rich in chalcopyrite (copper-iron sulfide) intergrown with silver minerals from epithermal deposits, beneficiated for metal recovery. This concentrate is classified under tariff item 2616.10.00 as a silver ore concentrate with copper content.
2616.10.00Chlorargyrite Concentrate
Flotation concentrate derived from chlorargyrite ore, enriched to 40-60% silver content for smelting. This concentrate is a silver-bearing material used in cyanidation or smelting circuits, classified under tariff item 2616.10.00.
2616.10.00Coarse Gold-Content Silver Flotation Concentrate
Flotation concentrate from silver ore with coarse particles (>4.75mm in majority) carrying gold values, reported statistically under this code. It fits 2616.10.00 for gold content in silver ore products, as silver remains the primary metal.
2616.10.00Cyanidation Silver Tailings
Tailings from silver cyanidation circuits with Merrill-Crowe precipitates recycled as concentrate, containing 1-5% metallic silver cement. This material is used for silver recovery and falls under tariff item 2616.10.00 as a silver-bearing concentrate.
2616.10.00Doré Ore Concentrate
Doré-grade silver-gold ore concentrate from refractory processing, containing 200-400 oz Ag per ton. The concentrate has been pressure oxidized before cyanide leaching, a process normal to the metallurgical industry, and is classified as a silver ore concentrate under heading 26.16.
2616.10.00Dukat Silver Concentrate
Polymetallic silver concentrate from Polymetal's Dukat hub in Russia, featuring 800+ g/mt silver. The high silver content justifies classification under 2616.10.00, as per statistical reporting requirements for silver concentrates.
2616.10.00Epithermal Silver Vein Ore
High-grade epithermal vein ore from Tertiary deposits, averaging 1,000 g/t Ag. This direct ship ore is a silver ore used for metallurgical extraction, classified under tariff item 2616.10.00.
2616.10.00Flotation Concentrate from Silver Ores
Flotation-processed concentrate from polymetallic silver ores featuring copper sulfides like chalcopyrite, with silver as tellurides or native form. This concentrate falls under tariff item 2616.10.00 as silver ore concentrate with copper content.
2616.10.00Fresnillo Proaño Silver Ore
Polymetallic ore from Fresnillo's Proaño mine in Mexico featuring primary silver mineralization at 250 g/mt. It is classified under 2616.10.00 based on dominant silver content per assay, feeding silver smelting operations.
2616.10.00Galena-Rich Silver Concentrate
Concentrate from galena (lead sulfide) deposits associated with silver veins, with lead content exceeding statistical thresholds. Falls under heading 26.16 as a silver concentrate distinguished by lead content in the statistical notes.
2616.10.00High-Grade Zinc Silver Flotation Concentrate
Flotation-processed concentrate from silver-lead-zinc deposits, with zinc as a key component alongside silver minerals. Falls under heading 26.16 as a silver concentrate where zinc content is statistically reported.
2616.10.00Imiter Silver Concentrate
Flotation concentrate from the Imiter mine in Morocco, with silver content exceeding 500 g/mt after beneficiation. It falls under 2616.10.00 as a silver concentrate with quantified silver content, per statistical notes.
2616.10.00Jarositic Silver Residue
Jarositic residue from zinc electrowinning containing recoverable silver (50-200 ppm), cemented for concentrate. This processing residue is returned to the silver circuit and is classifiable as a silver-bearing residue under heading 26.16, provided it is used for metal extraction.
2616.10.00Lead-Bearing Silver Ore Concentrate
A concentrated ore primarily containing silver with significant lead content, extracted from silver deposits and processed to enrich metal values. Classified under heading 26.16 due to its lead content in silver ores.
2616.10.00Native Silver-Copper Mineral Concentrate
Concentrate featuring native silver grains with copper-native associations from oxidized zones, milled and floated. This concentrate is classified under tariff item 2616.10.00 for silver ore concentrates with copper content.
2616.10.00Native Silver-Lead Alloy Ore
Naturally occurring ore with native silver electrum alloyed with lead, concentrated for metal recovery. Classified under heading 26.16 as a silver ore due to precious metal primacy and lead content reporting.
2616.10.00Native Silver Ore
Native silver ore consists of elemental silver grains embedded in gangue rock from epithermal deposits. This unrefined silver-bearing material is milled and gravity concentrated for silver recovery, falling under tariff item 2616.10.00.
2616.10.00Peñasquito Silver Ore
Gold-silver ore from Newmont's Peñasquito mine in Mexico with 150 g/mt silver content. It is classified under 2616.10.00 due to significant silver mineralization reported by assay, processed via cyanide leaching for dual metal recovery.
2616.10.00Polybasite Silver Ore
Polybasite ((Ag,Cu)16Sb2S11) is a complex silver copper ore from epithermal deposits with 50-70% Ag equivalent. This silver-dominant ore is processed via selective flotation and falls under tariff item 2616.10.00.
2616.10.00Polymetallic Silver-Copper Flotation Product
Beneficiated flotation product from silver-lead-zinc-copper ores, enriched for silver with notable copper sulfides. This product is classified under tariff item 2616.10.00 for silver concentrates, reporting copper content statistically.
2616.10.00Polymetallic Silver-Zinc Ore Concentrate
A complex polymetallic concentrate from silver ores featuring substantial zinc, copper, and lead. Classified under heading 26.16 based on zinc content within the silver ore category, primarily for hydrometallurgical recovery.
2616.10.00Proustite Silver Ore
Proustite (Ag3AsS3) is a silver sulfosalt ore from low-temperature veins, assaying around 60% silver. This ore is processed via flotation and roasting for silver recovery, classified under tariff item 2616.10.00.
2616.10.00Refinery Zinc Flux Silver Concentrate
Silver concentrate used as zinc flux in refinery operations, with reportable zinc content. Classified under heading 26.16 for zinc statistical tracking in silver materials, not for direct metal extraction but as a process aid.
2616.10.00Silver-Bearing Galena Ore
Galena (PbS) ore with 100-500 g/t silver from sedimentary deposits, co-mined for dual recovery. Differential flotation separates lead and silver, and the ore is classifiable under heading 26.16 when silver justifies principal classification.
2616.10.00Silver-Copper Bearing Ore Concentrate
A mineral concentrate derived from silver ores containing a significant copper content, typically processed through flotation to enrich silver and associated copper sulfides. Classified under heading 26.16 as a silver ore concentrate, with copper content reported statistically.
2616.10.00Silver-Lead Flotation Tails
Flotation tailings reprocessed for residual silver (50 g/t) from lead circuits. The tailings are leached or retorted for final extraction, and are classifiable as silver ores under heading 26.16 when silver recovery is viable.
2616.10.00Silver-Lead Sulfide Flotation Product
Flotation tailings upgraded to concentrate with silver and lead sulfides, meeting lead content criteria. Under heading 26.16 as a silver ore concentrate with statistical lead reporting, from polymetallic ore processing.
2616.10.00Stephanite Concentrate
Stephanite (Ag12Sb4S13) silver-antimony concentrate produced by froth flotation, containing 60%+ silver. This concentrate is smelted to antimonial lead bullion and falls under tariff item 2616.10.00 for silver concentrates.
2616.10.00Yunnan Silver Concentrate
Lead-silver concentrate from Chinese Yunnan province operations, with 300 g/mt Ag content. It is classified under 2616.10.00 for silver reporting despite the lead matrix, as a major export product to Asian smelters.
2616.10.00Zinc-Bearing Silver Ore Concentrate
A mineral concentrate derived from silver ores containing significant zinc content, primarily used for precious metal extraction. Classified under heading 26.16 due to its zinc content in silver ore concentrates.
2616.10.00Zinc-Rich Silver Ore Tailings Concentrate
A concentrate recovered from silver mine tailings with elevated zinc levels, suitable for reprocessing to extract silver. It qualifies as a silver ore concentrate under tariff item 2616.10.00 because its primary metal content is silver, despite the zinc presence.
2616.90.00Alluvial Gold Gravel Concentrate
A concentrate from placer mining operations consisting of gold-bearing gravel and sands separated by gravity methods. Classified under 2616.90.00 for gold content in other precious metal ores and concentrates, commonly imported for further processing.
2616.90.00Anglesite Lead Sulfate Ore Concentrate
Anglesite lead sulfate ore concentrate, derived from the mineral PbSO4, is separated using density methods to yield a lead-rich product. It is classified under tariff item 2616.90.00 as a precious metal ore concentrate, with the lead content reported for statistical purposes. This concentrate is primarily supplied to lead refineries for metal extraction.
2616.90.00Bio-Oxidized Gold Ore Residue
A residue from bio-oxidation pretreatment of refractory sulfide gold ores, exposing gold for cyanidation. Classified under 2616.90.00 as an advanced processing intermediate, with gold content reported statistically.
2616.90.00Bonanza Silver Vein Ore
High-grade silver vein ore from Cobalt, Ontario, containing native silver in quartz-carbonate gangue. This ore is used directly in metallurgical extraction of silver and falls under tariff item 2616.90.00 as an 'other' precious metal ore.
2616.90.00Broken Hill Lead Ore Concentrate
Broken Hill lead ore concentrate is a classic lead-silver concentrate from the Broken Hill deposit type, processed to yield high lead content. It falls under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported statistically. This concentrate is used in lead and silver extraction at refineries.
2616.90.00Carbonaceous Gold Ore Concentrate
An ore concentrate with gold associated in carbonaceous material, requiring preg-robbing prevention in cyanidation. Classified under 2616.90.00 based on gold content as other precious metal ores, used in specialized carbon-in-leach (CIL) circuits.
2616.90.00Carbonate-Replacement Lead Deposit Concentrate
Carbonate-replacement lead deposit concentrate is produced from lead-rich ores in carbonate-hosted replacement deposits. It is classified under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported for statistical purposes. This concentrate is used in non-ferrous metal extraction, particularly lead refining.
2616.90.00Cerussite Lead Carbonate Concentrate
Cerussite lead carbonate concentrate is a flotation product from cerussite (PbCO3), a secondary lead mineral with substantial lead content. It is classified under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported statistically. This concentrate is used in non-ferrous metal extraction, particularly lead smelting.
2616.90.00Copper-Bearing Gold Ore Concentrate
A concentrate derived from precious metal ores containing significant copper content, primarily used for gold extraction with copper as a byproduct. It falls under tariff item 2616.90.00 as 'other' precious metal ores and concentrates.
2616.90.00Doré Ore Intermediate Concentrate
An intermediate concentrate resembling doré with high gold content from primary ore processing. Classified under 2616.90.00 for gold content prior to full smelting, serving as a bridge product between ore and refined metal.
2616.90.00Doré Slime with Copper Impurities
Refinery slime from doré processing containing residual copper alongside precious metals, concentrated for recovery. This material is classified under tariff item 2616.90.00 as 'other' precious metal ores and concentrates.
2616.90.00Flotation Gold-Silver Concentrate
A flotation concentrate from polymetallic ores with dominant gold and silver content, commonly used as doré refinery feed. Classified under 2616.90.00 with gold content reported statistically.
2616.90.00Galena Lead Ore Concentrate
Galena lead ore concentrate is derived from galena (PbS), the primary lead sulfide mineral, with a high lead assay after milling and flotation. It is classified under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported for statistical purposes. This concentrate is essential for lead smelting and refining operations.
2616.90.00Gold Bearing Quartz Ore
Crushed quartz ore containing visible gold particles and traces of other precious metals, mined primarily for gold extraction. This ore is classified under tariff item 2616.90.00 as 'other' precious metal ores and concentrates, as it does not fit specific subheadings.
2616.90.00Gold-Copper Pyrrhotite Concentrate
Concentrate containing gold values associated with copper-bearing pyrrhotite from polymetallic deposits. This concentrate falls under tariff item 2616.90.00 as 'other' precious metal ores and concentrates.
2616.90.00Gold-Tellurium Ore from Oxidation Zones
Supergene enriched gossan containing native gold and tellurides from oxidation zones. This complex precious metal ore requires specialized metallurgy for extraction and is classified under tariff item 2616.90.00 as 'other' precious metal ores.
2616.90.00Gold-Zinc Ore Flotation Concentrate
A flotation concentrate produced from gold ore deposits containing substantial zinc, used in smelters for the simultaneous recovery of gold and zinc. It falls under tariff item 2616.90.00 as an 'other' precious metal ore concentrate, with the zinc content reported for statistical purposes.
2616.90.00Hydrothermal Lead Ore Concentrate
Hydrothermal lead ore concentrate is produced from hydrothermal vein deposits rich in lead sulfides, processed for high-grade lead content. It is classified under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported statistically. This concentrate is intended for electrolytic refining of lead.
2616.90.00Irish-Type Lead Deposit Concentrate
Irish-type lead deposit concentrate is produced from Irish-style massive sulfide deposits with a focus on lead content. It is classified under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported for statistical purposes. This concentrate is used in lead extraction at smelters.
2616.90.00Kipushi-Type Lead-Zinc Concentrate
Kipushi-type lead-zinc concentrate is a high-grade concentrate from Kipushi-style deposits, with lead content reported for classification. It falls under tariff item 2616.90.00 as a precious metal ore concentrate, with lead content reported statistically. This concentrate is used in industrial metal extraction, particularly lead and zinc recovery.