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    Black Onyx Sirloin SB 5

    $33.50

    Perfect for the BBQ, grill, or pan, the Black Onyx Sirloin SB 5 delivers enhanced marbling and rich Angus flavour, thriving with high-heat cooking to produce a caramelised crust and juicy, tender finish.

    Portion Size

    Pickup available at Peter Augustus Store Camp Hill

    Usually ready in 24 hours


    Black Onyx Sirloin SB 5

    This Black Onyx Sirloin sets a new standard in premium Angus, delivering exceptional eating quality through considered breeding and refined feeding programs. With enhanced marbling and signature Angus flavour, it offers a bold, beef-forward profile with excellent balance and consistency.

    Product Overview

    • Black Onyx Sirloin SB 5
    • Grain finished for a minimum of 230 days
    • Enhanced marbling with signature Angus flavour
    • Designed for premium retail and food service
    • Australian family-owned

    Performance & Quality

    • SB 5 grading with enhanced marbling
    • Elevated tenderness with a classic sirloin bite
    • Rich, beef-forward flavour that stands above the ordinary
    • Excellent performance across grilling, pan-searing, and roasting

    Wholesale Advantages

    • Ideal for steakhouses, restaurants, and premium butchers
    • Consistent quality for repeatable high-end results
    • Strong yield and portion control
    • Reliable performance across multiple cooking applications

    Why This Product

    • Sets a new benchmark in premium Angus beef
    • Enhanced marbling for improved juiciness and flavour
    • Refined feeding program for consistent quality
    • Perfect for premium menus and everyday steak offerings

    This Black Onyx Sirloin pairs exceptionally well with our condiments such as truffle butters or house-made chimichurri, enhancing its richness and depth of flavour.

    Delivery & Storage

    • Keep refrigerated at 0–4°C upon delivery.
    • Store in the coldest part of the refrigerator.
    • Do not leave at room temperature for extended periods.
    • Do not refreeze if previously chilled.
    • Consume within 24–48 hours of delivery, or by the use-by date.
    • Cook thoroughly before consumption.

    The Black Onyx Sirloin SB 5 delivers bold Angus flavour, balanced tenderness, and consistent premium performance across every cut.

    Striploin

    Striploin, also known as Sirloin, New York Strip, or Porterhouse (when bone-in), is a premium cut prized for its bold flavour and balanced tenderness. It comes from the short loin of the cow and features a fine grain with a satisfying bite. It's a favourite among chefs and home cooks alike for its generous marbling and robust, beefy taste.

    Frequently Asked Questions

    Our Beef

    Where does our beef come from?

    All of our beef is from our parent company Stanbroke Beef. This is important as the quality of the beef and ultimately your eating experience is determined by the care that has been shown to the animal during each stage of the production process. Any undue stress the animal experiences at any stage of its life is detrimental to the beef it will produce.

    As Stanbroke owns and operates each stage of the production process, strict best practices are followed to ensure the animals always receive the highest of care and that’s why at Peter Augustus we can guarantee the quality of our product each and every time.

    SB Marble Scores

    What is an SB Marble Score?

    The SB Score measures intramuscular fat (the white flecks in the meat). Higher scores mean more marbling, which results in superior tenderness, juiciness, and a richer, buttery flavour.

    Which score should I choose?

    • SB 0–2: Leaner, traditional beef flavour with a robust texture.
    • SB 3–5: Our "everyday premium" level; a perfect balance of flavour and tenderness.
    • SB 6–10: The indulgent peak, featuring extreme marbling for a melt-in-your-mouth experience.

    Meat Quality & Colour

    What is vacuum sealing and how does it extend shelf life?

    Vacuum sealing removes air from the packaging, slowing oxidation and bacterial growth to extend freshness and shelf life. When stored correctly at 0–4°C, you can expect the following guide:

    • Beef primals & whole cuts: up to 28 days
    • Beef (steaks): up to 21 days
    • Beef (bone-in): up to 14 days
    • Lamb: up to 28 days
    • Pork: up to 10 days
    • Ham: up to 30 days
    • Sausages: up to 9 days
    • Chicken (frozen): up to 12 months
    • Salmon (frozen): up to 12 months
    • Smoked salmon: up to 30 days

    For longer storage, keep products frozen at -18°C, where vacuum sealed meat can last 1 to 3 years depending on the cut and consistency of temperature.

    Once opened, the shelf life reverts to that of standard fresh products, so we recommend consuming promptly.

    For longer delivery routes, some items may arrive partially or fully frozen to ensure they remain within safe temperatures during transit.

    Why is my steak dark in the vacuum pack?

    Our beef is vacuum sealed to lock in freshness and extend shelf life by removing oxygen. This can cause the meat to appear darker or slightly purplish due to natural myoglobin, which is completely normal.

    Once opened, simply let your steak rest out of the packaging for 10 to 20 minutes. As it’s exposed to air, it will “bloom” back to its natural rich red colour. Rest assured, your beef is fresh and perfectly safe to enjoy.

    Is it safe to eat?

    Yes. If the “Use By” date is within range your meat is fresh. Any colour variation from vacuum sealing is normal and will return to its natural red once opened and allowed to bloom.

    Delivery & Packaging

    What are your delivery fees?

    We offer a range of pickup and delivery options to suit you:

    • Free pickup is available from our Camp Hill store in Brisbane. Simply select pickup at checkout.
    • Free shipping is available on subscription-only orders.
    • Free shipping is automatically applied to orders over $200.
    • Refrigerated delivery starts from $30 (including GST), with final pricing based on your location, order size, and weight. Enter your address at checkout to calculate the exact rate.

    All delivery orders are packed in a food-safe, insulated chilled box with ice packs to maintain safe temperatures throughout transit.

    Can I request custom cutting instructions?

    Yes, our butchers are happy to accommodate custom cutting requests where possible and safe to do so. For example, you may like a rump cap portioned into steaks. Simply specify your preferred thickness or weight per piece, such as approximately 2.5cm or 300g portions.

    You can add these instructions in the “View Cart” section before checkout using the notes box or send them through to us via email.

    How is my order kept cold?

    We use specialist refrigerated courier partners to keep your order within the cold chain from dispatch to delivery. Each order is packed in a thermal carton lined with VISYCELL® sustainable insulation, a food-grade, biodegradable material designed to maintain a consistent chilled temperature throughout transit.

    We also include large 1kg ice gel packs in every box to help keep your products at optimal temperature. Our packaging has been tested to maintain safe temperatures for a few hours after delivery when left in a shaded area.

    My box arrived looking a bit scuffed. Is the meat okay?

    While the outer carton may show signs of handling during delivery, the internal insulation is specifically built to protect the contents and preserve freshness.

    What should I do if I have concerns?

    If you detect any issues with the temperature or seal of your products upon arrival, please contact our team immediately so we can find a solution for you.