How Many Eggs Does a Sapphire Gem Lay Per Year?
A Sapphire Gem hen lays 260 to 290 large brown eggs per year. Realistic estimates by age, a month-by-month breakdown, and a formula for any flock size.
A Sapphire Gem hen lays 260 to 290 large brown eggs per year, which puts her among the most productive backyard hybrids. The biggest variable is age: like other production hybrids she lays hard in her first year or two, then output falls off faster than a heritage breed's. For a healthy first-year hen in a well-managed flock, the most realistic estimate is 280 to 290 eggs annually. Despite the sapphire-blue plumage, the eggs are brown, not blue.
Use the egg production calculator to model your specific flock.
Production ranges
| Scenario | Annual eggs | Avg / week | Avg / day | When this happens |
|---|---|---|---|---|
| Low | ~230 | ~4.4 | ~0.63 | Hen past her second year, or winter without light |
| Normal | ~270 | ~5.2 | ~0.74 | First or second year hen, natural daylight, standard layer feed |
| High | ~300 | ~5.8 | ~0.82 | Year 1, 16-hr lighting, 16 to 18% protein |
The Normal row is the most realistic starting point for planning. It assumes a healthy first or second year hen on layer feed with natural daylight. Sapphire Gems are bred for output, so a strong young hen really will give you close to an egg a day through her prime.
The eggs are brown, not blue. The “sapphire” name and the blue-lavender feathers fool a lot of buyers. Sapphire Gems are often confused with the Sapphire chicken, a white bird that lays bright blue eggs, and with the Sapphire Sky, which lays olive. The Gem lays large to extra-large brown eggs.
By year, month, week, and day
| Time period | Low (~230/yr) | Normal (~270/yr) | High (~300/yr) |
|---|---|---|---|
| Per year | 230 | 270 | 300 |
| Per month (average) | ~19.2 | ~22.5 | ~25 |
| Per week (average) | ~4.4 | ~5.2 | ~5.8 |
| Per day (average) | ~0.63 | ~0.74 | ~0.82 |
| Dozens per year | ~19.2 | ~22.5 | ~25 |
A hen lays one egg every 24 to 26 hours at full production and skips days, so the daily average never quite reaches 1.0 even for a heavy hybrid. A peak Sapphire Gem comes close, running five to six eggs a week, which is why a few hens go a long way toward feeding a family.
The formula
Scale to any flock size:
Weekly eggs = Number of hens × 6 × Age Factor × Season Factor
The baseline of 6 is a Sapphire Gem’s peak weekly output in her first year. Adjust it down with the factors below as the flock ages and the seasons change.
| Factor | Multiplier |
|---|---|
| Year 1 (peak) | ×1.00 |
| Year 2 | ×0.84 |
| Year 3 | ×0.66 |
| Year 4 | ×0.50 |
| Year 5 | ×0.38 |
| Spring / Summer | ×1.00 |
| Fall (Sept to Oct) | ×0.90 |
| Winter, no supplemental light | ×0.75 |
| Winter, 16-hr light schedule | ×0.95 |
Example: 6 hens × 6 × 0.84 (Year 2) × 0.75 (winter, no light) = 23 eggs per week.
One caveat for this bird: the age factors above are the standard backyard curve, and production hybrids like the Sapphire Gem tend to decline a little faster than that after year two. Treat the later years as an optimistic ceiling. Use the egg production calculator to model your specific flock by age and season.
How production drops year over year
Production slides down gradually rather than stopping at a set age. The table applies the standard age factors to the Normal annual figure of ~270 eggs.
| Year | Per hen / year | Per hen / week | 6-bird flock / year | 6-bird flock / week |
|---|---|---|---|---|
| Year 1 (peak) | ~270 | ~5.2 | ~1,620 | ~31 |
| Year 2 | ~227 | ~4.4 | ~1,361 | ~26 |
| Year 3 | ~178 | ~3.4 | ~1,069 | ~21 |
| Year 4 | ~135 | ~2.6 | ~810 | ~16 |
| Year 5 | ~103 | ~2.0 | ~616 | ~12 |
Because the Sapphire Gem is a production hybrid, real birds often drop off more sharply after their second year than this standard curve shows, so treat the year 3 to 5 numbers as a best case. Many keepers who want steady volume bring in new pullets every two to three years and let the older hens stay on as slower layers and pets.
Month by month (first-year hen)
Sapphire Gems lay well year-round and are both cold-hardy and heat-tolerant, so their seasonal swing is gentler than most breeds. The main dip comes from short winter daylight rather than temperature.
| Month | Natural light only | With 16-hr coop lighting | Notes |
|---|---|---|---|
| January | 19 | 24 | Shortest days; watch single comb for frost |
| February | 21 | 24 | Picking back up |
| March | 23 | 24 | Days lengthening |
| April | 25 | 25 | Spring peak |
| May | 25 | 25 | Strong laying |
| June | 24 | 24 | Heat-tolerant, holds well |
| July | 23 | 23 | Steady through summer |
| August | 23 | 23 | Steady |
| September | 23 | 23 | Reliable |
| October | 22 | 24 | Strong fall laying |
| November | 21 | 24 | Slowing with shorter days |
| December | 21 | 24 | Minimum without lighting |
If you choose to use supplemental light, start it in early September before the days shorten and aim for 14 to 16 total hours. Keep the schedule steady once you begin, since a sudden cut in day length will knock production down faster than the cold ever does.
What changes the number
The single biggest lever on a Sapphire Gem’s annual total is her age, because she is a production hybrid built to lay hard early.
Age and the production-hybrid curve
Sapphire Gems lay their best in the first two years, near 270 eggs in year one and around 225 in year two, then ease off year by year. As a hybrid bred for early output, she declines faster than a heritage hen, so do not expect her to hold near 290 for life. Keepers who want steady volume refresh the flock with young pullets every two to three years.
Egg color
Sapphire Gem eggs are large to extra-large and brown, full stop. The blue-lavender plumage and the “sapphire” name lead many buyers to expect blue eggs, but that comes from confusion with the unrelated Sapphire chicken and the olive-laying Sapphire Sky. If a blue or colored basket is the goal, this is not the bird.
Daylight and winter laying
Hens need 14 to 16 hours of light to lay at full rate, and natural daylight falls below that in winter. Sapphire Gems hold their winter laying well for a heavy layer, with a modest dip in the darkest weeks. If you use lights, keep the day length steady, because a sudden decrease will cut laying. If output drops sharply with no winter, molt, or age-related cause, consult a licensed poultry veterinarian or your local extension service.
What you actually bought
The Sapphire Gem is a sex-linked hybrid trademarked by a hatchery, not an APA-recognized breed, created by crossing a Blue Plymouth Rock with a Barred Plymouth Rock and traced to a Czech breeding line. It does not breed true, so two Sapphire Gems will not produce Sapphire Gem chicks, and appearance and laying can vary slightly between hatchery lines. Buy from a reputable hatchery if consistent type and production matter.
Feed protein
Keep layer feed at 16 to 18% protein with free-choice oyster shell for calcium. A bird laying close to an egg a day pulls a lot of calcium, so thin or rough shells are an early sign to check the calcium supply rather than the hen.
Cold, heat, and frostbite
Sapphire Gems are unusually adaptable, laying through both cold and heat better than most breeds. The one weak point is the single comb, which can frostbite in hard freezes, so dry bedding and good ventilation through winter protect the comb tips.
How Sapphire Gems compare
First-year production under normal backyard conditions.
| Breed | Annual eggs | Egg color | Type | Vs Sapphire Gem |
|---|---|---|---|---|
| Sapphire Gem | 260 to 290 | Brown, large to XL | Hybrid | Baseline |
| ISA Brown | 300 to 320 | Brown | Hybrid | Higher |
| Rhode Island Red | 250 to 300 | Brown | Heritage | Similar |
| Plymouth Rock | 200 to 280 | Brown | Heritage | Lower |
| Easter Egger | 200 to 280 | Blue, green, or varied | Dual-purpose | Lower |
The honest verdict: a Sapphire Gem is the pick when you want near-maximum brown eggs from a hardy, friendly, good-looking bird and you do not mind that she is a hybrid rather than a heritage breed. Only a dedicated brown-egg hybrid like the ISA Brown clearly out-lays her, and her striking blue-lavender plumage and calm temperament are a real bonus over a plainer production hen. The trade-offs are the ones common to all hybrids: a shorter productive peak, a faster decline, and chicks that will not come true. And remember the eggs are brown, so if you want a colorful basket, pair her with an Easter Egger or a true blue-egg layer.
Use the breed selector quiz to compare breeds against your goals and setup.
Frequently asked questions
How many eggs does a Sapphire Gem lay per year?
A Sapphire Gem hen lays about 260 to 290 large brown eggs per year, among the most of any backyard hybrid. A strong first-year hen on good feed and daylight reaches the top of that range.
How many eggs does a Sapphire Gem lay per week?
A laying Sapphire Gem produces about 5 to 6 eggs per week at her peak, close to an egg a day. That settles toward four or five a week across the full year once winter and molt are folded in.
When do Sapphire Gems start laying eggs?
Sapphire Gems usually lay their first egg between 18 and 24 weeks of age, about 4.5 to 6 months. As a production hybrid she matures earlier than most heritage breeds.
Do Sapphire Gems lay blue eggs?
No, Sapphire Gems lay brown eggs despite their blue-lavender feathers and the “sapphire” name. The confusion comes from two unrelated birds: the Sapphire chicken, which lays blue, and the Sapphire Sky, which lays olive.
How many eggs will 6 Sapphire Gem hens lay per year?
Six Sapphire Gem hens lay roughly 1,400 to 1,700 eggs in their first year, which is a lot of eggs for a small flock. Run your own numbers with the egg production calculator, which adjusts for flock age and season.
Do Sapphire Gems lay eggs in winter?
Yes, Sapphire Gems lay through winter better than most breeds, with only a modest dip in the shortest days. Keeping their day length steady and their single comb protected from frost helps them stay productive.
Are Sapphire Gems a real breed, and do they breed true?
Sapphire Gems are a sex-linked hybrid, not an APA-recognized breed, created from a Blue Plymouth Rock crossed with a Barred Plymouth Rock. They do not breed true, so chicks from two Sapphire Gems will not be Sapphire Gems.
Sources: Hoover’s Hatchery (hoovershatchery.com), Purdue University Extension (extension.purdue.edu), Chicken Starter (chickenstarter.com), The Happy Chicken Coop (thehappychickencoop.com). For health concerns about your flock, consult a licensed poultry veterinarian. Last reviewed June 2026.